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8/16/2019 CircCircuit Protection in Health Care Facilitiesuit Protection in Health Care Facilities
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Critical Power: Circuit Protection
in Health Care Facilities
Sponsored by:
8/16/2019 CircCircuit Protection in Health Care Facilitiesuit Protection in Health Care Facilities
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Today’s Webcast Sponsors:
8/16/2019 CircCircuit Protection in Health Care Facilitiesuit Protection in Health Care Facilities
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Neal Boothe, PE,
exp US Services Inc.,
aitland, !la.
"a#es !erris, PE,
T$% En&ineerin& 'or (rchitect)re,
*rlando, !la.
oderator: (#ara +o&)s,Editor in %hie',
Consulting-Specifying Engineer and
Pure Power
Presenters:
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-. The a)dience ill )nderstand the applicable codes: N!P( /0:
National Electrical %ode, (rticle 1-/, N!P( 22: 3ealth %are
!acilities %ode, and N!P( --0: Standard 'or E#er&ency and
Standby Poer Syste#s.
4. (ttendees ill )nderstand the coordination, overc)rrent, short5
circ)it, and &ro)nd5'a)lt protection iss)es 'or health care 'acilities.
6. 7ieers ill learn abo)t 'eeder protection desi&n re8)ire#ents 'orhealth care 'acilities.
9. 7ieers ill learn abo)t branch protection desi&n re8)ire#ents 'or
health care 'acilities.
$earnin& *bectives
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Critical Power: Circuit Protection
in Health Care Facilities
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(pplicable %odes
; National Electrical %ode Edition here
; N!P( 22, 3ealth %are !acilities %ode; Used the 40-4 Edition here
; N!P( --0, Standard 'or E#er&ency and
Standby Poer Syste#s; Used the 40-6 Edition here
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?)ic@ Tho)&hts on These %odes
; National Electrical %ode
A By 'ar #ost speci'ic re8)ire#ents
A !oc)ses on Electrical Sa'ety
A %hapters - A 9 Still (pply to 3ospitals
A (rticle 1-/ A 3ealth %are !acilities adds ne
re8)ire#ents
A (rticle /00 A E#er&ency Syste#s A Stillapplies to 3ealth %are
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?)ic@ Tho)&hts on These %odes
; N!P( 22, 3ealth %are !acilities %ode
A %overs #any #ore topics than electrical
A %hapter A Electrical Syste#s
; .6.4.- A N!P( 22 de'ines per'or#ance re8)ired to
ens)re sa'ety. NE% de'ines ays syste#s #)st be
installed to achieve desired per'or#ance.
; There is a &reat deal o' re'erencin& beteen N!P(
22 and NE% (rticle 1-/
A %hapter -0 A Electrical E8)ip#ent
; (pplies #ore to #an)'act)rers than desi&ners
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?)ic@ Tho)&hts on These %odes
; N!P( --0, Standard 'or E#er&ency and
Standby Poer Syste#s
A %oncerned ith Cenerator, (TS, etc.
A Not ritten aro)nd )st health care
A 3ospitals D $evel - Syste# . . . B)t so are
other b)ildin& types
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!eeder Branch %irc)it Protection
; NE% 1-/.-4 A Except as #odi'ied in this
article, irin& #ethods shall co#ply ith
the applicable re8)ire#ents 'or %hapters
- thro)&h %hapter 9 o' this Code.
; So, yo) can’t )st loo@ at (rticle 1-/
A It adds ne re8)ire#ents
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!eeder Branch %irc)it Protection
; !eeders A Not too #)ch di''erent 'or
hospitals
A Panels servin& critical care areas
; Branch circ)its A 7ery speci'ic
re8)ire#ents 'or hospitals
A Patient care vers)s Non5Patient care
A E#er&ency vers)s *thers
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What is a Patient %are (reaF
; Per NE% 1-/.-> 1-/.-2, to types:
-. Ceneral %are A Patients in contact ith ordinary
appliances; edicalGs)r&ical roo#s, exa# roo#s, etc.
4. %ritical %are A Patients s)bect to invasive proced)res
; I%U, *+s, %atheteriation $abs, $aborGHelivery, %oronary
%are, Tra)#a, E#er&ency %are, etc.
; Note: (reas s)ch as n)rse stations, #edical
prep, no)rish#ent, clean, soil, etc. aren’t Patient
%are (reas
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3ospital !eeder %irc)it Protection
; !or Panels Servin& %ritical %are (reas
A Per NE% 1-/.-2, i' #etal cond)it, I, or %
cable is )sed
; Cro)nd Panel to !eeder via: A Cro)ndin& b)shin&
A Threaded h)bs
A *ther approved devices
; (ny other areas
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3ospital Branch %irc)it Protection
; To ain Tho)&hts . . .
A +ed)ndant &ro)ndin& re8)ired 'or all patient
care area branch circ)its A NE% 1-/.-6
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Patient %are (rea
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Patient %are (rea
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Exceptions to echanical Protection
; Non5Patient %are (reas
A Sched)le >0 P7%
A In %oncrete
; Sched)le 90 P7%
; !lex non5#etallic or ac@eted #etallic raceay
; "ac@eted #etallic cable
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Exceptions to echanical Protection
; Patient %are (reas
A !lexible #etal #etal sheathed cable in:
; In listed #edical headalls
; In listed o''ice ')rnit)re
; !ished into existin& alls or ceilin&s
; Necessary 'or 'lexible connection
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3ospital Crade !lexible %able
; ( JcrossK beteen (% and % %able
A 3as a &ro)ndin& cond)ctor
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In a Non5Patient %are (rea
; E#er&ency %irc)its
-. +ed)ndant &ro)ndin& not re8)ired
4. Still re8)ire #echanical protection
6. (llos #ore 'lexibility o' installation A b)t 4still leads to #etal cond)it o'ten
; Nor#al %irc)its
-. +ed)ndant &ro)ndin& not re8)ired4. echanical protection not re8)ired
6. This allos #)ch #ore 'lexibility o' installation
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Short %irc)it Protection
; Inp)t Hata
; %alc)lations
; E8)ip#ent +atin&s; Na#eplates
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Short %irc)it Inp)t Hata
; Utility !a)lt %ontrib)tion
; Cenerator !a)lt %ontrib)tion
; otor %ontrib)tion
; !eeder Sie $en&ths
; Trans'or#er Sie I#pedance
; LI' (lloed by ()thority 3avin& ")risdiction A
%)rrent $i#itin& devices+es)lts: Short %irc)it !a)lt (vailable at locations
thro)&ho)t the distrib)tion
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!a)lt %alc)lations on Cenerator or Utility
; )st %onsider both so)rces as potential
so)rce o' 'a)lt c)rrent.
; Utility co#pany ill provide a letter
indicatin& the available 'a)lt at the service
; Cenerator #an)'act)rerMs can provide the
'a)lt o)tp)t o' each en&ine
; So#eti#es both o' these are in parallel
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Short %irc)it %alc)lation +es)lts Exa#ple
BUS V3-Phase Faulton Utility A!
3-Phase Fault on"enerators A!
#ar$estAvailable Fault
(3U 45- 9>0 210.6 2/19.4 2/19
(TS %+- 9>0 99292.4 99929.1 99292
(TS E?4 9>0 6221.6 9699>.1 96992%34*+HPB 9>0 6421.- 66>29.> 66>21
%$4( 40> 112>.4 1121.2 112>
$S3- 9>0 4-4-.1 4--0.6 4-44
N36 9>0 40146.2 4-00.9 4-00
L (lso need to calc)late the Sin&le $ine to Cro)nd as on Cenerator poer that
is o'ten the orse case.
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Short %irc)it +atin&s A in the !ield
; (I%: A#ps %nterr)ption C)rrent
A Brea@ers !)ses have this
; WS+: &ithStand +atin& A
A Enclos)res G E8)ip#ent s)ch as an
()to#atic Trans'er Sitch
; S%%+: Short Circ)it C)rrent 'atin&
A U$ 10>( G NE% 902.--0 re8)ires Ind)strial
%ontrol Panels to be labeled ith S%%+
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Short %irc)it +atin&s A in the !ield
; +evie E8)ip#ent
Na#eplates in the 'ield
to ens)re they #eet the
re8)ire#ents o' the
Short %irc)it%alc)lations
Air Handlin$ Unit (a)eplate
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Short %irc)it +atin&s A What needs oneF
Sitchboards ()to#atic
Trans'erSitches
Panelboards
otor%ontrollers
ElectricalHisconnects
Elevator%ontrollers
P)#pStarters
Ind)strial%ontrolPanels
(d)stableSpeed Hrives
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Selective %oordination
; NE% He'inition o' Selective %oordination
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Selective %oordination Coal
-. Protect other circ)its by ens)rin& the
brea@er in tro)ble trips 'irst
4. Protectin& e8)ip#ent and in'rastr)ct)re
a. Trans'or#ers
b. %ables
c. otors
d. Cenerators
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Selective %oordination Exa#ple
( 0( ain %irc)it
Brea@er Panelboard
Serves several 40(
%irc)its
( 'a)lt on the 40(
circ)it brea@er
sho)ld not trip the
0( brea@er
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Selective %oordination Process
Select*vercurrent
+evice
Chec,Coordination
Adust+istribution
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Selective %oordination He#onstration
; Use Ti#e5%)rrent%)rves tode#onstrate
Selective%oordination
Current
. i ) e
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Exa#pleExa#ple o' a
typical ti#e5
c)rrent plot
here all the
brea@ers 'or a
partic)lardistrib)tion are
shon in a sin&le
plot.
Selective
coordinationocc)rs here
there is space
beteen the
brea@ers.
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Selective %oordination 0.-s Hebate
; NE% does not indicate a
ti#e re8)ire#ent 'or
Selective %oordination.; N!P( 22, 3ealth %are
!acilities, 40-4 Edition
indicates that in a
hospital Selective
%oordination Starts at
0.- Second
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Selective %oordination 0.-s Hebate
!or 3ealth %are 'acilitiesonly, here 40-4 isapplicable
; *verc)rrent protectiondoes not have toselectively coordinate'ro# 0 to 0.-s
; Hisclai#er A disc)ssthis ith yo)r local
(3"
*verc)rrent Protection
in this area #)stselectively coordinate
*verc)rrent Protection in
this area sho)ld, b)t does
not have to coordinate
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Cro)nd !a)lt Protection
; 3ospitals re8)ire to levels o'
&ro)nd 'a)lt protection
; Separation #)st be cycles
per NE%, (rticle 1-/
; Typical Cro)nd !a)lt Plot
shon at the ri&ht
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(rc !lash Personnel Protection
ShortCircuit
Available
*vercurrent+evice
Settin$s
Arc Flash/ner$y
Available
Short %irc)it, Selective %oordination have a direct i#pact on ho #)ch
ener&y is available in an (rc !lash Event.
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$earnin& *bective S)##ary
; (pplicable %odes
; !eeder Branch %irc)it Protection
; +ed)ndant Cro)ndin& at Patient
$ocations
; Short5%irc)it %alc)lations
; Selective %oordination; (rc !lash
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S)b#ittin& ?)estions, Exit S)rvey and (rchive
?)estionF
Type yo)r 8)estion in the J(s@ a ?)estionK box on the Webcast
%onsole and clic@ JSend.K We ill &et to as #any 8)estions as e
have ti#e 'or. ?)estions that are 'or today’s presenters ill be
ansered verbally d)rin& the ?( session.
Exit S)rvey:
Please ta@e a #o#ent to anser a 'e 8)estions on o)r exit
s)rvey that ill pop )p on yo)r screen at the concl)sion o' the
ebcast. We )se the ansers to help #a@e i#prove#ents to o)rebcast pro&ra#.
(rchive:; Within / days, an archive ith ?( ill be posted
; We ill send an e#ail to re&istered attendees ith hyperlin@;
http://www.csemag.com/
8/16/2019 CircCircuit Protection in Health Care Facilitiesuit Protection in Health Care Facilities
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Neal Boothe, PE,exp US Services Inc.,
aitland, !la.
"a#es !erris, PE,T$% En&ineerin& 'or (rchitect)re,
*rlando, !la.
oderator: (#ara +o&)s,Editor in %hie',
Consulting-Specifying Engineer and
Pure Power
Presenters:
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Than@s to Today’s Webcast Sponsors:
8/16/2019 CircCircuit Protection in Health Care Facilitiesuit Protection in Health Care Facilities
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Critical Power: Circuit Protection
in Health Care Facilities
Sponsored by: