210.8 (F) GFCIs for AC units

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mbrooke

mbrooke

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A rather interesting article. What does everyone think of this new rule?

www.mikeholt.com

210.8(F) and the 2020 NEC

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www.mikeholt.com


Me, personally, I strong disagree with CMP's 5 decision to expand GFCIs to cover for potential inadequacies in 430.52 or 250.4 (A) 5.

IMO, GFCIs can be done without as they should not be used as the means to limit final short circuit and ground fault wire temperatures to 150*C.

How are things for other folks?
 
thankfully Massachusetts deleted this requirement. I was told at code cycle update that this requirement was because of one electrocution incident with ungrounded AC condenser and a boy climbing over a fence.
 
farmantenna said:
thankfully Massachusetts deleted this requirement. I was told at code cycle update that this requirement was because of one electrocution incident with ungrounded AC condenser and a boy climbing over a fence.
Click to expand...

A while back someone brought up a very good point that the copper refrigerant lines from the unit to the furnace would still have tripped the OCPD. IMO, I am tempted to say there was more that went on in that case.
 
The nec has been pro-gfci in the '20 cycle , but it's revealed a case of dueling standards.....

Even if HVAC equipment is listed to the UL 60335-2-40 standard, there is no guarantee it will be compatible with UL listed GFCI breakers This lack of coordination is what is leading to the nuisance tripping that customers are dealing with.

none of this would be an issue, if a good egc was verified

~RJ~
 
romex jockey said:
The nec has been pro-gfci in the '20 cycle , but it's revealed a case of dueling standards.....

Even if HVAC equipment is listed to the UL 60335-2-40 standard, there is no guarantee it will be compatible with UL listed GFCI breakers This lack of coordination is what is leading to the nuisance tripping that customers are dealing with.

none of this would be an issue, if a good egc was verified

~RJ~
Click to expand...


60335-2-40 I swear that numbering system seem familiar.
 
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