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Safety Clearance for Electrical Panel

August 26, 2012 6 Comments 

Safety Clearance for Electrical Panel:

 Working Space around Indoor Panel/Circuit Board (NES 3122!:

"oltage

E#po$ed li%e

part$ to Not li%e

part$( or

grounded part$ !

E#po$ed li%e

part$ to

&rounded part$

(concrete' rick'

and )all$!

E#po$ed li%e

part$ on ot*

$ide$

Up to 150 V0.914 Meter (3

Ft)0.914 Meter (3

Ft)0.914 Meter (3

Ft)

150 V to 600 V0.914 Meter (3

Ft)1.07 Meter (3’6) 1.22 Meter (4 Ft)

 Clearance around an Indoor electrical panel (NES 11+2,!:

-e$cription of Clearance -i$tance (.in!

!e"t to #$g%t t%e m$n$mum

&'ern&e0.9 Meter (3 Ft)

$stn&e *et+een ne' n- +'' 1.0 Meter  

$stn&e *et+een ne' n-Ce$'$ng 0.9 Meter 

C'er e$g%t $n "ront o"

ne'/40V2.0 Meter 

C'er e$g%t $n "ront o" ne'40V 0.9 Meter (3 Ft)

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C'ern&e %en F&$ng t%er

'e&tr$&' ne's 40V

0.9 Meter (3 Ft)

%e +$-t% o" t%e +or$ngsp&e

$n "ront o" t%e ne'

%e +$-t% o" ne' or 0.762 Meter +%$&% $s

reter.

e-room o" +or$ng sp&es "or 

 pne' *or-s (Up to 200Amp)Up to 2 Meter 

e-room o" +or$ng sp&es "or 

 pne' *or-s (More t%n

200Amp 8ne' %e$g%t $s m 2Meter)

Up to 2 Meter( :" ne' %e$g%t $s m 2 Meter)

e-room o" +or$ng sp&es "or  pne' *or-s (More t%n

200Amp 8ne' %e$g%t $s more

t%n 2 Meter)

:" ne' %e$g%t $s more t%n 2 Meter t%n

&'ern&e s%ou'- not 'ess t%n pne' e$g%t

ntrn&e For ne' (More t%n

1200 Amp n- o;er 1. m $-e)

ne entrn&e re<u$re- "or +or$ng sp&e (=ot

'ess t%n 610 mm +$-e n- 2.0 m %$g% )

erson' oor For ne' (More

t%n 1200 Amp)

ersonne' -oor(s) $nten-e- "or entrn&e to n-

egress "rom t%e +or$ng sp&e 'ess t%n 7.6 m"rom t%e nerest e-ge o" t%e +or$ng sp&e

e-$&te- 'e&tr$&' >p&e.

#e<u$re- >p&e $s +$-t% n- -ept% o" t%e ne'n- eten-$ng "rom t%e "'oor to %e$g%t o" 1.

m (6 "t) *o;e t%e e<u$pment or to t%e

stru&tur' &e$'$ng, +%$&%e;er $s 'o+er 

%e -oor(s) s%'' open $n t%e-$re&t$on o" egress n- *e

e<u$ppe- +$t% pn$& *rs,

 pressure p'tes, or ot%er -e;$&est%t re norm''? 't&%e- *ut

open un-er s$mp'e pressure

 

t%e +or sp&e s%'' perm$t t

'est 90 -egree open$ng o"

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e<u$pment -oors or %$nge-

 pne's

 Clearance for Conductor Entering in Panel (NES +0!:

-e$cription of Clearance -i$tance (.in!

>p&$ng *et+een %e &on-u$t

or r&e+?s($n&'u-$ng t%e$r en-

"$tt$ngs) n- @ottom o" n&'osure

 =ot r$se more t%n 75 mm(3 $n) *o;e t%e *ottom o" 

t%e en&'osure

>p&$ng @et+een @ottom

o" n&'osure n- :nsu'te- *us *rs, t%e$r supports,

200 mm

>p&$ng @et+een @ottom o" n&'osure n- =on $nsu'te- *us

 *rs

200 mm

 Clearance et)een Bare etal Bu$ ar in Panel (NES +0!:

"oltage

ppo$ite

Polarityounte

d on Sa.e

Surface

ppo$ite

PolarityW*ere

4eld 5ree in

6ir

7i%e Part$

to &round

Up to 125 V 19.1 mm 12.7 mm 12.7 mm

125 V to 250V

31. mm 19.1 mm 12.7 mm

250 V to 600

V

50. mm 25.4 mm 25.4 mm

 Clearance of utdoor electrical panel to 5ence/Wall (NES 11+31!:

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"oltage -i$tance (.in!

600 V to 13. V

3.05 Meter 

13. V to 230 V

4.57 Meter 

A*o;e 230 V

5.49 Meter 

 Working Space around Indoor Panel/Circuit Board (NES 11+3!:

"oltage

E#po$ed li%e

part$ to Not li%e

part$( or

grounded part$ !

E#po$ed li%epart$ to

&rounded part$

(concrete' rick'

and )all$!

E#po$ed li%epart$ on ot*

$ide$

601 V to 2.5 V 0.914 Meter (3 Ft) 1.2 Meter (4 Ft) 1.5 Meter (5 Ft)

2.5 V to 9.0  

V

1.2 Meter (4 Ft) 1.5 Meter (5 Ft) 1. Meter (6 Ft)

9.0 V to 25

V 1.5 Meter (5 Ft) 1. Meter (6 Ft) 2.5 Meter ( Ft)

25 V to 75

V 1. Meter (6 Ft) 2.5 Meter ( Ft) 3.0 Meter (10 Ft)

A*o;e 75 V 2.5 Meter ( Ft) 3.0 Meter (10 Ft) 3.7 Meter (12 Ft)

 Clearance around an utdoor electrical panel (NES 11+31!:

-e$cription of Clearance -i$tance (.in!

Clear )ork $pace:  =ot 'ess t%n 2.0 Meter %$g%(Mesure-

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;ert$&''? "rom t%e "'oor or p't"orm) or 

not 'ess t%n 914 mm (3 "t) +$-e

(Mesure- pr''e' to t%e e<u$pment).

Entrance 5or Panel (More t%n1200 Amp n- o;er 1. m $-e)

ne entrn&e re<u$re- "or +or$ngsp&e (=ot 'ess t%n 610 mm +$-e n-

2.0 m %$g% )

Entrance 5or Panel: n !rge pne's e&ee-$ng 1. Meter $n

+$-t%

ne ntrn&e t e&% en- o" t%ee<u$pment.

 =onmet''$& or Met'Ben&'ose-

ne' $n gener' pu*'$& n- t%e *ottom o" t%e en&'osure $s 'ess

t%n 2.5 m ( "t) *o;e t%e "'oor

or gr-e 'e;e'

n&'osure -oor or %$nge- &o;er s%'' *e

ept 'o&e-.

 Ele%ation of 8nguarded 7i%e Part$ ao%e Working Space (NES 11+3E!:

"oltage Ele%ation (.in!

600 V to 7.5 V

2. Meter 

7.5 V to 35 V

2.9 Meter 

A*o;e 35 V

2.9 Meter 9.5 mmDV

 Working Space for Panel (Code &eorgia Po)er Co.pany!:

"oltage

pose- '$;e

 prts to =ot '$;e

 prts( or

groun-e- prts )

pose- '$;e

 prts to

roun-e- prts

(&on&rete, *r$&,

n- +''s).

pose-

'$;e prts on

 *ot% s$-es

Up to 150 V 3.0 Meter  

3.0 Meter 3.0 Meter  

150 V to 600 V

3.0 Meter 3.5 Meter 4.0 Meter  

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600 V to 2.5V

3.0 Meter 4.0 Meter 5.0 Meter  

2.5 V to 9V

3.0 Meter 5.0 Meter 6.0 Meter  

9 V to 25 V

5.0 Meter 6.0 Meter 6.0 Meter