6

Sentron Low Amp Busway System

SL

4

02

C

1

0

P

L

0

Warehouse Catalog Straight Sections Elbows and Offsets End Tap BoxesStock Numbering Tees Center Tap Boxes

System

8 9 10-11 12 13 14

7

225-

800A

mp

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Flanged Ends Expansion Fittings, Hangers, Supports Technical Data BuswayReducers and End Closures and SpecificationsPhase Rotation FlangesFittings

15 16 17 18-19 20

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Warehouse Stock

Sentron Low Amp busway is availablefrom warehouse stock in a wide offeringof straight sections and fittings essentialfor completing busway runs. Orderingfrom stock, can save the contractor bothtime and money over cable and conduit.Aluminum 3-phase, 3-wire and 3-phase,4-wire busway is available from 225 ampsto 600 amps. Copper 3-phase, 3-wire and3-phase, 4-wire busway is available from225 amps to 800 amps. Copper also avail-able with integral or internal ground. Allwarehouse stock is rated IP40.

The chart to the right lists straight sections and fittings available throughwarehouse stock.

Sentron Low Amp Warehouse StockAmpere Rating Description Aluminum Copper

225A

6 ft. Plug-in ✔ ✔

10 ft. Plug-in ✔ ✔

5 ft. Feeder N/A N/A10 ft. Feeder N/A N/AFlat Elbows ✔ ✔

Edge Elbows ✔ ✔

End Tap Boxes ✔ ✔

Center Tap Boxes ✔ ✔

Flanged Ends N/A N/AFlanges ✔ ✔

Hangers ✔ ✔

End Closures ✔ ✔

400A

6 ft. Plug-in ✔ ✔

10 ft. Plug-in ✔ ✔

5 ft. Feeder ✔ ✔

10 ft. Feeder ✔ ✔

Flat Elbows ✔ ✔

Edge Elbows ✔ ✔

End Tap Boxes ✔ ✔

Center Tap Boxes ✔ ✔

Flanged Ends ✔ ✔

Flanges ✔ ✔

Hangers ✔ ✔

End Closures ✔ ✔

600A

6 ft. Plug-in ✔ ✔

10 ft. Plug-in ✔ ✔

5 ft. Feeder ✔ ✔

10 ft. Feeder ✔ ✔

Flat Elbows ✔ ✔

Edge Elbows ✔ ✔

End Tap Boxes ✔ ✔

Center Tap Boxes ✔ ✔

Flanged Ends ✔ ✔

Flanges ✔ ✔

Hangers ✔ ✔

End Closures ✔ ✔

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Sentron Low Amp Catalog Numbering System

S L 4 0 2 C 1 0 P L 0 6

Sentron Low AmpSL = US Lengths

Configuration3 = 3Ø, 3W4 = 3Ø, 4W5 = 3Ø, 4W 200% Neutral

Ampere Rating02 = 225A04 = 400A06 = 600A08 = 800A1

Bus Bar MaterialC = CopperA = Aluminum

Ground1 = Integral (Housing)2 = Internal Bus Bar23 = Isolated Ground3

IP Rating0 = IP403 = IP434 = IP54

1 Copper Bus Bars only2 Copper Ground Bars only3 Copper Ground Bars only:

available in 225A-600A Aluminum Bus Barsavailable in 400A-800A Copper Bus Bars only

• Standard feeder lengths shown. For custom lengths, use the last three catalog number characters for length in inches, e.g.: 8'-11" feeder = SL402C10F107

• Catalog Numbers for Hangers and Flanges can be found on page 17

• Specials must be ordered by description (drawing must be included)See page 56 for New Order Checklist

Plug-in L

Feeder D

Elbows L

Tees E

Offsets F

Combinations O

End Cable TTap Boxes

Center Cable TTap Boxes

Service Heads H

Transposition R

Joint Stacks StandardIsolation

Flanged Ends E

End Closures C

EXpansion SSections

Reducers FusedNon-fused

Length 04 = 4'0"06 = 6'0"08 = 8'0"10 = 10'0"

Length 02 = 2'0"03 = 3'0"05 = 5'0"10 = 10'0"

Edge UpDown

Flat RightLeft

Edge UpDown

Flat RightLeft

Edge UpDown

Flat RightLeft

Edge Up Flat LeftEdge Down Flat LeftEdge Up Flat RightEdge Down Flat RightFlat Left Edge UpFlat Left Edge DownFlat Right Edge UpFlat Right Edge Down

Vertical StandardHorizontal

B Standard

Transformer 1 =1 Phase3 =3 Phase

PG = Phase & GroundPO = Phase onlyGO = Ground only

Suffix part of Catalog Numbers

Straight Sections

Sentron Low Amp Busway can beordered with Aluminum or Copper busbars. Aluminum bars are available in 225 - 600 ampere sections, and include an integral housing ground. An optionalcopper internal or isolated ground bar isavailable in 225-800 ampere sections.

Copper bars are available in 225-800ampere sections, and include an integralhousing ground. An optional copper internal ground bar is available. A copperisolated ground bar is available for 400-800ampere copper busway.

Sentron Low Amp is also available in IECratings from 100-630 amperes with alu-minum bus bars or 100-800 amperes withcopper bus bars.

Sentron Low Amp housing is a two-pieceextruded aluminum design which isassembled using a henrob fastening process. The self-piercing rivet technologyis a mechanically applied mixture of zinc,tin and aluminum that coats the rivet toresist salt, galvanic and other forms of corrosion. The self-piercing rivets provideoptimal structural integrity.

Feeder Sections

Feeder busway carries the current of thebusway system from the supply source.Feeder busway does not have plug-in out-lets. Sentron Low Amp IP40 feeder sec-tions are warehoused in standard lengths.Custom lengths and IP43 and IP54 maybe ordered from the factory. Sentron LowAmp Feeder sections meet IP40 (indoor),IP43 (spray proof), and IP54 (splash proof)requirements. One joint stack assembly issupplied per feeder section.

Plug-In Sections

Sentron Low Amp plug-in sections aredesigned with plug-in openings centeredon 24 in. (610mm) intervals. Plug-in open-ings are staggered on both sides of thebusway for optimum utilization. IP40 plug-in sections are warehoused in standardlengths. Sentron Low Amp plug-in sec-tions meet IP40 (indoor). IP43 (sprayproof), and IP54 (splash proof) require-ments. One joint stack assembly is provid-ed per plug-in section.

Plug-In Outlet Features

The plug-in outlet molded guard designprevents incidental finger contact with liveconductors. Sentron Low Amp plug-in out-lets are IP 2X rated: a .472 in. (12mm) testprobe is unable to enter a plug-in outlet.Configuration connections are clearlymarked on the plug-in outlet to ensureproper contact of phase and ground barswith bus plug fingers.

Straight SectionsPlug-In and Feeder

CL of Joint CL of Joint

120 in.(3048 mm)

GAø

Bø

NeutralCø

Standard Feeder SectionSuffix FD02, FD03, FD05, FD10

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CL of Joint CL Plug-in Outlet CL of Joint

Sentron Low Amp

12 in.(305 mm)

24 in.(610 mm)

GAø

Bø

NeutralCø

Standard Plug-In Section (Standard plug-in outlets on both sides on 24 in. centers)Suffix PL04 (4 ft.), PL06 (6 ft.), PL08 (8 ft.), PL10 (10 ft.)

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Sentron Low Amp Busway Widths and WeightsAmpere Profile Approximate Weight – lbs per ft. (kg per meter)Rating 3-Phase 3-Phase 3-Phase 3-Phase 3-Phase 3-Phase

3-Wire 3-Wire 4-Wire 4-Wire 4-Wire 4-Wirewith Ground with Ground 200% Neutral 200% Neutral

with GroundAluminum

225 C 2.7 (4.0) 3.0 (4.4) 2.9 (4.3) 3.1 (4.7) 3.0 (4.5) 3.3 (4.9)

400 D 3.6 (5.4) 4.1 (6.2) 3.9 (5.9) 4.4 (6.6) 4.2 (6.3) 4.7 (7.1)

600 E 5.0 (7.5) 5.8 (8.7) 5.6 (8.3) 6.4 (9.5) 6.2 (9.2) 7.0 (10.4)

Copper

225 A 2.7 (4.0) 2.9 (4.2) 3.0 (4.4) 3.1 (4.6) 3.2 (4.8) 3.4 (5.0)

400 C 3.8 (5.7) 4.1 (6.1) 4.4 (6.5) 4.6 (6.9) 4.9 (7.3) 5.2 (7.7)

600 D 5.7 (8.5) 6.2 (9.2) 6.7 (10.0) 7.2 (10.7) 7.7 (11.5) 8.2 (12.2)

800 E 9.0 (13.3) 9.8 (14.5) 10.8 (16.1) 11.7 (17.3) 12.7 (18.9) 13.5 (20.1)

2.00 in.(51mm)

5.50 in.(140mm)

4.05 in.(103mm)

2.75 in.(70mm)

Profile EBarsize

4.25 x 0.125 in. (108 x 3.2mm)

Profile DBarsize

2.80 x 0.094 in. (71 x 2.4mm)

Profile CBarsize

1.50 x 0.094 in. (38 x 2.4mm)

Profile ABarsize

0.75 x 0.094 (19 x 2.4)

5.00 in.(127 mm)

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Flat Right ElbowSuffix ELFR

Elbows and Tees

Elbows

Sentron Low Amp elbows provide a sim-ple, convenient method of changing thedirection (left, right, up or down) of abusway run. All elbows are shipped witha joint stack assembly on one end fordirect connection to the busway system.

Flatwise elbows are used for left andright directional changes when thebusway system is mounted in the hori-zontal plane; bus bars run parallel to thefloor. The joint stack assembly may bemoved to the opposite leg to change theorientation from left to right/right to left.

Edgewise elbows create up and downdirectional changes. The joint stackassembly on edgewise elbows can notbe moved in order to change orientationfrom up to down/down to up.

For both edgewise and flatwise elbows the sum of the two legs may not exceed 10 ft. (3.05m). See drawingsfor minimum/standard dimensions.

Tees

Tees are used to simplify directional andplane orientation changes in a buswaysystem. Tees can make 90° bends left orright and up and down along the buswayrun. All tees are supplied with two jointstack assemblies.

Flatwise tees are used to create left andright branches.

Edgewise tees are used to create branches that stem up or down from the busway run.

12 in.(305 mm)

12 in.(305 mm)

CL

CL CL

CLof Joint

Flat Left ElbowSuffix ELFL

12 in.(305 mm)

12 in.(305 mm)

CL

CLof Joint

CL

Edge Up ElbowSuffix ELEU

12 in.(305 mm)

12 in.(305 mm)

CLof Joint

CL

CL

CL

Edge Down ElbowSuffix ELED

12 in.(305 mm)

12 in.(305 mm)

CL

CL

CLof Joint

Flat Right TeeSuffix TEFR

12 in.(305 mm)

12 in.(305 mm)

12 in.(305 mm)

CL

CL

CLof JointCL

CL

Flat Left TeeSuffix TEFL

12 in.(305 mm)

12 in.(305 mm)

12 in.(305 mm)

CL

CL

CLof Joint

CL

CL

Edge Up TeeSuffix TEEU

18 in.(457 mm)

20 in.(508 mm)

34 in.(864 mm)

8 in.(203 mm)

8 in.(203 mm)

8 in.(203 mm)

8 in.(203 mm)

12 in.(305 mm)

1

CL CLCL

CL

CL

12 in.(305 mm)

Of Joint

Edge Down TeeSuffix TEED

18 in.(457 mm)

20 in. (508 mm)

12 in.(305 mm)

16 in.(407 mm)

1

4 in.(102 mm)

1

8 in.(203 mm)

CL

CL CL

CL

CL

12 in.(305 mm)

Of Joint

CL

Of Joint

34 in.(864 mm)

1 Add 4 inches (102mm) for internal or isolated ground.

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Offsets

Offsets

Offsets can be utilized to solve difficultcontour problems and save space. Inapplications where space does not allowfor two connected elbows, a single offsetcan bypass an obstruction. All offsets aresupplied with one joint stack assembly.

The overall dimension may not exceed 10 ft. (3.05m).

Flat RightSuffix OFFR

CL

CL

CL

CL of Joint

CL

12 in.(305 mm)

12 in.(305 mm)

A

Flat LeftSuffix OFFL

CL

CL

CL

CL

of Joint

12 in.(305 mm)

12 in.(305 mm)

A

CL

Edge UpSuffix OFEU

CL

CL

CLof Joint

CL

CL

B

12 in.(305 mm)

12 in.(305 mm)

Edge DownSuffix OFED

CL

CL

CL of Joint

CL

B

12 in.(305 mm)

12 in.(305 mm)

Flatwise Offsets, Minimum Leg DimensionsAmpere “A” Std./min.Rating Inches (mm)

Aluminum

225 7.0 (178)400 7.5 (191)600 8.5 (216)

Copper

225 7.0 (178)400 7.0 (178)600 7.5 (191)800 8.5 (216)

Edgewise Offsets, Minimum Leg DimensionsAmpere “B” Std./min.Rating Inches (mm)

Aluminum

225 8.5 (216)400 8.5 (216)600 8.5 (216)

Copper

225 8.5 (216)400 8.5 (216)600 8.5 (216)800 8.5 (216)

End Tap Boxes and Center Tap Boxes

CL

8.6 in.(218 mm)

CL

20 in.(510 mm) 1

15 in.(381mm)

8 in.(203 mm)

CL

31.5 in.(800 mm)

12 in.(305 mm)

Horizontal End Tap BoxSuffix ETHS

End Tap Boxes

End tap boxes are non-fusible devicesused to connect cable and conduit to theend of a busway run or where buswayruns connect without the need for over-current protection. End tap boxes may beinstalled at the end or beginning of a run.Vertical end tap boxes and horizontal endtap boxes can be installed in both horizon-tal and vertical applications. One jointstack assembly is provided with each endtap box.

Center Tap Boxes

Center tap boxes are non-fusible devicesutilized to feed to or take off power fromthe busway run. When loads served bythe busway run do not require over-current protection, center tap boxes maybe used. Center tap boxes are an actualpart of the busway run and require aspace of 32 in. (810mm) for installation.One joint stack assembly is provided witheach center tap box.

Horizontal End Tap Boxes, LugsAmpere Cable Lugs per Phase and NeutralRating Qty. Size Cu/Al Ground Lugs

#6 AWG-350 kcmil

Aluminum

225 1 #6 AWG - 350 kcmil 1

400 1 #4 AWG - 600 kcmil 1

600 2 #4 AWG - 600 kcmil 1

Copper

225 1 #6 AWG - 350 kcmil 1

400 1 #4 AWG - 600 kcmil 1

600 2 #4 AWG - 600 kcmil 1

800 3 #4 AWG - 600 kcmil 1

Vertical End Tap Boxes, LugsAluminum

225 1 #6 AWG - 350 kcmil 1

400 1 #4 AWG - 600 kcmil 1

600 2 #4 AWG - 600 kcmil 1

Copper

225 1 #6 AWG - 350 kcmil 1

400 1 #4 AWG - 600 kcmil 1

600 2 #4 AWG - 600 kcmil 1

800 3 #4 AWG - 600 kcmil 1

Center Tap Boxes, LugsAluminum

225 4 #6 AWG - 350 kcmil 1

400 4 #4 AWG - 600 kcmil 1

600 4 #4 AWG - 600 kcmil 1

Copper

225 3 #4 AWG - 600 kcmil 1

400 4 #4 AWG - 600 kcmil 1

600 4 #4 AWG - 600 kcmil 1

800 4 #4 AWG - 600 kcmil 1

8 in.(203mm)

8 in.(203mm)

CL

CL

CL

Busway

20 in.(508mm) 1

CL

6.1 in.(155mm)

30 in. (762mm)

16 in.(406mm)

10 in,(254mm)

Note: 15 in. (381mm) gutter provided

Center Tap BoxSuffix CTBS

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20 in.(508mm) 1

15 in.(381mm)

8 in.(203mm)

CL

CL

CL

24.5 in.(622mm)

12 in.(305mm)

10 in.(254mm)

Vertical End Tap BoxSuffix ETVS

1 24 in. (610mm) for isolated ground

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Flanged Ends

Flanged Ends

Flanged ends provide a direct connectionto low voltage switchgear, switchboards,motor control centers, large power panels,and other electrical distribution equipment.Flanged ends are shipped with one jointstack assembly. The switchgear manufac-ture supplies lugs and mounting hardware.See illustration for flanged end drilling pat-terns. A combination flange/elbow may beused when the busway is in close proximi-ty to the switchgear. Flatwise and edge-wise combination flange/elbows require aminimum clearance of 5 in. (127mm) offthe top of the switchboard to the center-line of the busway.

Flanged EndSuffix FE

1.75 in.(44mm)

1.75 in.(44mm)

1.13 in.(29mm)

1.13 in.(29mm)

1.13 in.(29mm)

1.75 in.(44mm)

4.50 in.(114mm)

4.50 in.(114mm)

2.80 in.(71mm)

1.40 in.(36mm)

1.75 in.(44mm) AA

W WFor 4.25 in. (108mm) BarsFig 1, 0.75 in. (19mm),

Fig 2, 1.50 in. (38mm) and 2.80 in. (71mm) Bars

Housing Ground

CLCase

15.00 in.(381mm)

1.50 in.(38mm)

6.13 in.(158mm)

0.62 in.(16mm)

0.62 in.(16mm)

0.62 in.(16mm)

5.00 in.(127mm)

10.00 in.(254mm)

0.38 in.(10mm)

7.87 in.(200mm)

3.94 in.(100mm)

1.55 in.(39mm)

4.33 in.(110mm)

7.50 in.(191mm)

12.63 in.(321mm)

6.32 in.(161mm)

CL Case

3.57 in.(91mm)

W

8.00 in.(203mm)

8.00 in.(203mm)

4.00 in.(102mm)

4.00 in.(102mm)

4.00 in.(102mm)

4.00 in.(102mm)

2.13 in.(54mm)

5.03 in.(128mm)

CLCase

CLGround Strap

CLJointStack

Neutral CØ BØ AØ Isolated Ground

Ground

Dashed lines denote cutout

Flanged Ends Bus Bar Drilling Pattern, DimensionsAmpere Dimensions Inches (mm) Figure No.Rating W A

Aluminum

225 1.50 (38) 0.75 (19) 2

400 2.80 (71) 1.40 (36) 2

600 4.25 (108) 1.25 (32) 2

Copper

225 0.75 (19) 0.38 (97) 1

400 1.50 (38) 0.75 (19) 2

600 2.80 (71) 1.40 (36) 2

800 4.25 (108) 1.25 (32) 2

0.44 in.(11mm)

0.88 in.(22mm)

0.88 in.(22mm)

0.38 in.(10mm)

Figure 1 Figure 2

ø .56 in.(14mm)

Expansion Fittings, Reducers andPhase Rotation Fittings

12.75 in.(324mm)

8 in.(203mm)

24.8 in.(630mm) 21 in.

(533mm)1

38 in.(965mm)

8 in.(203mm)

CL

CL

Expansion FittingSuffix XS

8 in.(203 mm)

32 in.(813 mm)

48 in.(1219 mm)

8 in.(203 mm)CL

CL

10 in.(254 mm)

9 in.(229 mm)

CL

Phase Rotation FittingSuffix TRPG, Phase and Ground

TRPO, Phase onlyTRGO, Ground only

Expansion Fittings

Expansion fittings accommodate forexpansion and contraction of a buswayrun. In order to compensate for the difference in the coefficient of expansionbetween the copper/aluminum bus barsand the aluminum housing, an expansionfitting must be used. Expansion fittingsare installed in the center of long buswayruns, where both ends of the run are heldin a permanent, fixed positions or wherea busway run crosses an expansion jointof a building. Additionally, NEMA recom-mends the use of expansion fittingswhen the run exceeds 200 ft. (608m).Expansion fittings allow for a +/- 2 in.(50.8mm) movement along the length ofthe busway system.

Fused Reducers

The NEC (Art. 364-11) requires overcur-rent protection when busway systemsare reduced in ampacity. A fused reduceris used to reduce the allowable ampererating in those sections of the busway runthat do not require a higher rating (i.e. atbranch circuit junctures).

Non-Fused Reducers

Non-fused reducers are used in conjunc-tion with the following exception to theNEC (Art. 364-11): "For industrial estab-lishments only, omission of overcurrentprotection shall be permitted at pointswhere busways are reduced in ampacity,provided that the length of the buswayhaving the small ampacity does notexceed 50 ft. (15.2m) and has an ampaci-ty of at least equal to one-third the ratingor setting of the overcurrent device nextback on the line, and provided that suchbusway is free from contact with com-bustible material."

Special joint stack connections are provided for non-fused reducer connec-tions. Consult Factory for specific design guidelines.

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36 in.(914mm)

1.5 in.(38mm)

4.5 in.(114mm)

11 in.(279mm)

CL

20 in.(508mm)

20 in.(508mm)

Fused ReducerSuffix RF

Phase Rotation Examples

A

B

C

A

B

C

N

G

A

B

C

N

G

A

B

C

N

N

C

B

A

N

C

B

A

N

C

B

A

G

N

N

C

B

A

G

1 25 in. (608mm) for isolated ground

Phase-Rotation Fittings

Phase-rotation fittings can be used whenthe application requires a phase rotation inthe power supply. Phase rotation fittingscan be ordered for "phase and ground","phase only" and "ground only" rotations.

Hangers

A complete selection of hangers is availableto support Sentron Low Amp Busway inboth vertical and horizontal applications. Thestandard picture frame hanger comes com-plete with hardware (cat# UJ100) to connectto a ceiling hung drop rod. The contractormust supply drop rods to complete assem-blies for both picture frame hangers andtrapeze hangers. Picture frame and trapezehangers are designed to be hung on maxi-mum 10 ft. (3.05m) centers throughout thebusway run. Additional hangers may beused if structural requirements mandatetheir use. Spring hangers and floor supportsmust be used in vertical applications to pro-vide secure mounting of the busway run.Spring hangers counter the weight of thebusway on each floor and also compensatefor minimal building movement and thermalexpansion. Maximum distance betweenspring hangers or supports may not exceed16 ft. (4.88m). When ordering 18 ft. (5.49m)floor to ceiling height assemblies, intermedi-ate supports or hangers are necessary.

Flanges

Wall, ceiling and floor flanges are availablefor Sentron Low Amp Busway. When thebusway run passes through a wall, ceiling orfloor a flange should be used. Flanges donot offer support to the busway, only ameans of covering the hole created in theexisting structure. An additional sealant maybe required to meet fire codes and all otherlocal requirements. No caulking or gasketingis provided with Sentron Low Amp flanges.

End Closures

End closures safely terminate a busway runand protect the bus bar ends. End closuresmay be removed easily in order to extend a busway run. End closures are shippedwith Glastic insulation pieces; however, joint stacks and inspection covers are notincluded. To ensure proper installation, refer to the end closure installation instruc-tion sheet shipped with end closure.

Lifting Kit

A specially designed lifting kit (cat. no. SLLK)is recommended when installing SentronLow Amp Busway. This lifting kit is designedto help properly install the busway withoutdamaging equipment during the process. 17

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Hangers, Supports,End Closures and Flanges

9.25 in.(235 mm)

CL B

4" D

B= 4 in. plus D/2 (refer to page 11)

Wall Mounted HangerSLWH

C L of JointStack

16 in.Min.(406mm)

PiercingScrew

Floor Flange(optionalSpring Hanger

2 in.Min.(51mm)

by others

10 in.(254mm)

Leveling

Jam Nut

SupportBolt

Spring Hanger Spring Hangers, RequirementsAmpere Catalog Assembly for Floor to Ceiling Height 1Rating 10 ft. 12 ft. 14 ft. 16 ft. 18 ft.2

Aluminum Busway

225 SLSH218 SLSH218 SLSH235 SLSH418 SLSH418400 SLSH418 SLSH418 SLSH418 SLSH435 SLSH435600 SLSH418 SLSH435 SLSH435 SLSH435 SLSH435

Copper Busway

225 SLSH218 SLSH218 SLSH418 SLSH418 SLSH418400 SLSH418 SLSH418 SLSH418 SLSH435 SLSH435600 SLSH435 SLSH435 SLSH435 SLSH435 SLSH635800 SLSH435 SLSH435 SLSH635 SLSH635 SLSH6351 For height not listed, use next higher value.2 Additional floor support necessary for intermediate support

Wall, Ceiling and Floor Flanges, DimensionsAmpere Catalog No. Fig. Dimensions Inches (mm)Rating “A” Flange “B” Cutout

Aluminum Busway

225 SLWF3 1 7.94 (202) 4.25 (108)400 SLWF4 2 9.24 (235) 5.55 (141)600 SLWF5 2 10.69 (272) 7.00 (178)

Copper Busway

225 SLWF1 1 7.19 (183) 3.50 (89)400 SLWF3 1 7.94 (202) 4.25 (108)600 SLWF4 2 9.24 (235) 5.55 (141)800 SLWF5 2 10.69 (272) 7.00 (178)

AB

Cutout

3.25 in.(83 mm)

6.50 in.(165 mm)

Cutout

10.00 in.(254 mm)

5.00 in.(127 mm)

A/20.60 in.

(15 mm)

0.38 in.(10 mm)

0.63 in.(16 mm)

3.62 in.(92 mm)

3.62 in.(92 mm)

AB

Cutout

3.25 in.(83 mm)

6.50 in.(165 mm)

Cutout

10.00 in.(254 mm)

Figure 1 Figure 2

Wall, Ceiling and Floor Flanges

5.82 in.(148 mm)

CL of Joint

End Closures Suffix EC(Joint stack and covers not included)

Picture Frame HangerSLPF(Rods not included)

(UJ100 included)

2.25 in.(57mm)

Floor Support HangerSLFS

8.63 in.(219 mm)

0.50 in.(12 mm) Dia.Threaded Rod

.75 in.(19.1 mm)

Trapeze HangerSLTH(Rods and Nuts not included)

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Technical Data

Voltage DropAmpere Bus Bar Width Ohms x 10-3 per 100 feet Voltage Drop - Concentrated Loads, Line-to-Line per 100 feet at 100% Rated Load, 35°C Ambient Rating x Thickness Line to Neutral Power Factor

Inches (mm) R Z X 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0

Aluminum

225 1.50 (38) x .094 (2.4) 10.90 11.10 2.10 2.05 2.45 2.83 3.20 3.56 3.89 4.18 4.25

400 2.80 (71) x .094 (2.4) 6.46 6.55 1.08 2.06 2.48 2.89 3.29 3.67 4.03 4.35 4.48

600 4.25 (108) x .125 (3.2) 3.64 3.68 0.54 1.67 2.03 2.38 2.72 3.05 3.36 3.65 3.78

Copper

225 0.75 (19) x .094 (2.4) 13.40 13.50 1.64 2.18 2.67 3.16 3.64 4.11 4.56 4.98 5.22

400 1.50 (38) x .094 (2.4)) 7.09 7.17 1.07 2.18 2.64 3.10 3.54 3.97 4.37 4.74 4.91

600 2.80 (71) x .094 (2.4) 3.92 3.95 0.49 1.70 2.09 2.47 2.85 3.21 3.56 3.89 4.07

800 4.25 (108) x .125 (3.2) 2.11 2.13 0.29 1.26 1.54 1.81 2.08 2.33 2.58 2.81 2.92

Temperature Heat Rise, ALUMINUM

Notes:1. For plug-in distributed loads, divide voltage

drop values by 2.2. To determine voltage drop line-to-neutral, multiply

line-to-line values by 0.577.3. Actual voltage drop for different lengths and at loadings

less than full rated current can be calculated using the formula:

Vd (actual) = Vd (table) x actual load x actual length (ft)rated load 100 feet

4. For 50 Hz, multiply reactance (X) by 0.85 and resistance values do not change. For 400 Hz, multiply reactance by 3.75 and multiply resistance by 1.4. Calculate new voltage drop:

Vd = amps load x =√3(Rcos θ + X sin θ) per 100 ft, where cos θ = Power Factor.

5. For metric conversion R, X, Z values“in Ohms per meters Line to Neutral”R x .0328X x .0328Z x .0328

6. For metric conversion“Line to Line per meter at 25° C ambient in mV/A/m”(Vd 32.8) / A Divide Vd by 2 for distributed loads.

600A

400A

225A

10070

1000

900

800

700

500

400

300

100

200

600

6040 5030200 10

Temperature Rise °C (above ambient)

Load in Amps Busway Size

55

800A

600A

400A

225A

10070

1000

900

800

700

500

400

300

100

200

600

6040 5030200 10

Temperature Rise °C (above ambient)

Load in Amps Busway Size

55

Temperature Heat Rise, COPPER

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UL Short Circuit RatingsAmpere Bus Bar Width RMS Symmetrical (kA)Rating Inches (mm) 6 cycle 1 sec. 3 sec.

Aluminum

225 1.50 (38) x .094 (2.4) 30 6 4

400 2.80 (71) x .094 (2.4) 42 17 10

600 4.25 (108) x .125 (3.2) 50 28 16

Copper

225 0.75 (19) x .094 (2.4) 30 10 5

400 1.50 (38) x .094 (2.4) 35 20 12

600 2.80 (71) x .094 (2.4) 42 32 18

800 4.25 (108) x .125 (3.2) 65 42 24

50% Internal orIsolatedGround (PE)

A Phase (L1)

B Phase (L2)

C Phase (L3)

100% Neutral (N)

200% Neutral (N)

Ground CapacityAmpere Bus Bar Width Bars Min. Sectional Area Sectional Area Sectional Area Current CarryingRating Inches (mm) per Pole Ground Bus or Enclosure 50% Internal Integral (Housing) Capacity Ratio

UL 857 Table 6.1 Ground Bar Ground Integral/InternalIn2 (mm2) In2 (mm2) In2 (mm2)

Aluminum

225 1.50 (18) 1 0.083 (54.0) 0.084 (54.19) 2.124 (1370.32) 11.35

400 2.80 (71) 1 - 0.156 (100.64) 2.582 (1665.80) 7.43

600 4.25 (108) 1 - 0.235 (151.61) 3.094 (1996.13) 5.92

Copper

225 0.75 (19) 1 0.052 (34.0) 0.043 (27.74) 1.868 (1205.16) 19.50

400 1.50 (38) 1 - 0.084 (54.19) 2.124 (1370.32) 11.35

600 2.80 (71) 1 - 0.156 (100.64) 2.582 (1665.80) 7.43

800 4.25 (108) 1 0.105 (68.0) 0.235 (151.61) 3.094 (1996.13) 5.92

Note: Ground bar thickness = .055 in. (1.4mm)

UL 1479 Fire Rated Installation

Sentron Low Amp is certified in accor-dance with UL 1479 and offers a twohour fire rating for gypsum wallboard con-struction, and a three hour fire rating forconcrete slab or block penetrations.These ratings are achieved using stan-dard busway installed with SpecSeal®

sealant from Specified Technologies Inc.

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1.0 General A. Furnish and install a complete low

impedance prefabricated busway distri-bution system as shown on the plans.

B. Busway shall be ____ volts ____ phase____ wire with minimum 50% capacityintegral ground. Aluminum housing shallqualify for grounding purposes.

C. The ampere ratings, approximatefootage, fitting, plug-in units, etc., areshown on the plans. The electrical con-tractor shall be responsible for routingthe busway to coordinate with the othertrades. Final field measurements shall bemade by the contractor prior to release ofthe busway for fabrication.

2.0 Short-Circuit Rating and TestsA. The short-circuit rating of the busway

shall be (consulting engineer’s calculatedrequired rating), RMS symmetricalamperes.

B. The short circuit rating of the buswayshall be determined according to ULStandard No. 857 or IEC 439-1 and 439-2.This rating must be based upon actualtests at the rated short-circuit current forsix (6) cycles.

3.0 Basic ConstructionA. Housing

1. The busway housing shall be of extruded aluminum painted with polyester urethane powder paint to provide protection against corrosion.

2. The busway housing shall be totally enclosed non-ventilated for protectionagainst mechanical damage and dust accumulation.

3. The busway shall be certified for ___IP 40 Indoor, ___ IP 43 Spray Proof,___ IP 54 Splash Proof).

B. Joint1. The busway joint shall be of the one-

bolt type which utilizes a highstrength steel bolt and Bellevillewashers to maintain proper pressureover a large contact surface area.

2. The bolt shall be torque indicating,fully insulated and at ground potential.

3. The bolt shall be two-headed designto indicate when proper torque hasbeen applied and require only a standard long handle wrench to beproperly activated.

B Joint (cont’d)4. Access shall be required to only one

side of the busway for tightening jointbolts.

5. It shall be possible to remove anyjoint connection assembly to allowelectrical isolation or physical removalof a busway length without disturbingadjacent busway lengths.

C. Bus Bars1. The bus bars shall be tin plated at all

contact surfaces.2. Each bus bar shall be insulated over

its entire length with Class B, 130° Celectrostatically applied epoxy insulation.

3. The temperature rise at any point inthe busway shall not exceed 55°Crise above ambient temperaturewhen operating at rated load current.

D. Plug-in Openings1. On plug-in busway there shall be five

dead front, hinged cover type plug-inopenings on each side of ten-footlengths.

2. All openings shall be usable simulta-neously.

3. Busway shall be installed so thatplugs are side mounted to permitpractical use of all ten plug-in openings.

4. It shall be possible to inspect theplug-in opening and bus bars prior tothe installation of the plug-in unit.

5. All plug-in openings should be rated IP2X.

E. Support of Busway1. Hanger spacing shall be noted on lay-

out drawings and should not exceedmanufacturers’ recommendations.

2. Feeder and plug-in busway shall beapproved for hanger spacing of up to10 ft. for horizontally mounted runsand up to 16 ft. for vertically mountedruns.

F. Underwriters’ Laboratories Listing1. All straight lengths, fittings, and plug-

in units shall be listed and marked inaccordance with UL Standard No. 857or IEC 439-1 and 439-2.

2. This listing shall include mounting ofthe busway in any position (i.e., hori-zontal, flatwise, edgewise, and verti-cal) without derating.

4.0 Voltage DropA. The voltage drop (input voltage minus

output voltage) specified shall be basedon the busway operating at full rated cur-rent and at stabilized operating tempera-ture in 35°C ambient temperature.

B. The three-phase, line-to-line voltage dropshall not exceed 4.2 volts per hundredfeet at 70% power factor concentratedload, which condition may exist duringmotor starting.

5.0 Plug-In UnitsA. Plug-in units shall be ___ circuit breaker

type or ___ fusible switch type with visi-ble blade, and quick-make / quick-breakmechanism.

B. Plug-in units which cannot be operateddirectly from the floor shall be equippedwith suitable means for hookstick opera-tion.

C. The interrupting rating of circuit breakerplug-in units shall be [ ] RMS symmetri-cal amperes.

6.0 Plug-In Unit Safety DevicesA. Each plug-in unit shall be mechanically

interlocked with the busway housing toprevent installation or removal of plug-inunits while the switch is in the ON posi-tion.

B. Plug-in enclosures shall make positiveground connection with the ground busbefore the contact fingers make contactwith the phase bars.

C. The plug-in units shall be equipped withinternal barriers to prevent accidentalcontact with live parts on the line side ofthe protective device during time of wirepulling.

D. Covers of all plug-in units must have“releasable” type interlocks to preventthe cover from being opened when theswitch is in the ON position.

7.0 Fire RatingA. The busway shall be UL Listed

to meet two-hour fire ratings for gypsumwallboard construction and three-hourfire rating for poured concrete or con-crete block construction.

8.0 QualityA. All busway products shall be manufac-

tured in a facility which is QualitySystems registered to ISO9001.

9.0 Approved SuppliersA. All major components shall be of the

same manufacturer as the busway. Thebusway and plug-in units shall be manu-factured by Siemens.

Sentron Low Amp Busway Specifications