4" Clearance for Fuses and Reset Buttons?

[glick]

Have any of you heard of a rule that says fuses and reset buttons must have 4in. through air clearance to any uninsulated high voltage parts?

For example, an uninsulated contactor terminal must be at least 4" from a motor overload manual reset button.

I have searched through the NEC but cannot find it anywhere.

We had a safety officer mention this to us in an unofficial conversation.
It may not be NEC... it could be another standard I am unfamiliar with.

Thanks!

 

[rcarroll]

I've never heard of it. I took a quick look at art. 240 & 430 & didn't see anything. Ask the safety officer for more info, like a code section, amendments, safety manual, etc.

Good luck

 

[Jim W in Tampa]

So why didn't you ask him wear he got this ?

 

[Pierre C Belarge]

Have any of you heard of a rule that says fuses and reset buttons must have 4in. through air clearance to any uninsulated high voltage parts?

For example, an uninsulated contactor terminal must be at least 4" from a motor overload manual reset button.

I have searched through the NEC but cannot find it anywhere.

We had a safety officer mention this to us in an unofficial conversation.
It may not be NEC... it could be another standard I am unfamiliar with.

Thanks!

What do you consider high voltage as?

 

[buldogg]

Have any of you heard of a rule that says fuses and reset buttons must have 4in. through air clearance to any uninsulated high voltage parts?

For example, an uninsulated contactor terminal must be at least 4" from a motor overload manual reset button.

I have searched through the NEC but cannot find it anywhere.

We had a safety officer mention this to us in an unofficial conversation.
It may not be NEC... it could be another standard I am unfamiliar with.

Thanks!

What parts are you referring to?