PAnels and Disconnects (Mounting heights)?

[EdR]

Does the 6ft height rule applies for all disconnect switches and over current protection devices?

 

[bphgravity]

Do you mean the 6'7" rule found in 240.24(A) and 404.8(A) or the 6' rule found in 110.26(F)(1)?

 

[dcspector]

Do you mean the 6'7" rule found in 240.24(A) and 404.8(A) or the 6' rule found in 110.26(F)(1)?

Thanks Bryan,

I hear this all of the time and simply quote the Articles you mentioned. Also, I hear 6'-6" a lot.....where did that one come from?

 

[cowboyjwc]

Thanks Bryan,

I hear this all of the time and simply quote the Articles you mentioned. Also, I hear 6'-6" a lot.....where did that one come from?

My guess is it came from...."who in the heck came up with 6'7"?":smile:

 

[tom baker]

6' 6" is the mininum headroom. 6'7" is the max height for a disconnect, to the center of the operating handle in the on position.

 

[abe72487]

6 foot rule

6 foot rule

I was told that the 6 ft 7 in rule works to an even metric number I don't do metric.

 

[JohnJ0906]

I was told that the 6 ft 7 in rule works to an even metric number I don't do metric.

2 meters.

Because the NEC is an international standard, the metric is becoming more emphasized. IMO.

I think it is used in 7 other countries? 8?

 

[dcspector]

6' 6" is the mininum headroom. 6'7" is the max height for a disconnect, to the center of the operating handle in the on position.

Tom, that is probably where their confusion stems from.....makes sense.

 

[Dennis Alwon]

Does the 6ft height rule applies for all disconnect switches and over current protection devices?

I hope not. As Bryan mentioned art. 240.24 talks of 6'7" but allows access by portable means for equipment discos. Thus if there is a furnace above a dropped ceiling then the disco would be allow there.

 

[dcspector]

Thus if there is a furnace above a dropped ceiling then the disco would be allow there.

Good point Dennis and glad you brought that up. 404.8(A) exception no. 2