Originally Posted By: tgardner This post was automatically imported from our archived forum.
When I see those and they are duplex receptacles ( quite often ) I report that they should be a single recpt. for the disposal, or have GFI protection for safety. - tg
Originally Posted By: Scott Wilson This post was automatically imported from our archived forum.
You’ll oftentimes run into a scenario where a duplex receptacle is mounted under a kitchen sink; one part switched for a GD, and the other unswitched for a dishwasher.
If it is on 2 separate circuits, there is a requirement that the circuit breaker supplying the recp be supplied by a 2 pole circuit breaker or 2 breakers with a handle tie. (BTW, this requirement was not in older Codes, and applies to residential only)
The reason for this is so that if somenone shuts off one breaker and tests that portion of the recp, finding it unenergized, they won’t consider it dead and remove it with the potentially lethal results of having the other half of the duplex still live. The 2 pole C/B will kill both circuits.
As Ryan stated, there isn’t a GFI requirement for this type of installation.
Originally Posted By: Mike Parks This post was automatically imported from our archived forum.
In addition to Scott’s post.
Examples: Two circuits on one duplex outlet. Via a 3 wire setup (two 2 wires not allowed). Both circuits must be turned of at the same time.
2.) Two circuits ( in one box) feeding two seperate duplex or two single outlets. Both do not have to be turned of at the same time. Via a 3 wire setup.
I do not like this but it is allowed.
Looked at some temporary setups for fair use this week. 3 wire to duplex outlets. Not on a two pole (required). Another inspector required these to be seperate because HE wanted the bottom to stay 'hot' even if the top tripped. This from an ESI!
I say this because one must find the correct facts for themselves. Not every expert is correct.
PS If the above outlet was a 15/20 rated supplied by two 20amp circuits, I would have it changed to a 20amp duplex.
Check out 525-18. (525 deals with fairs, carnivals, circuses, and the like)Unless GFI protection is provided on the cordsets, the only way to get GFI protection on a multiwire circuit like you have described is…You guessed it!..With 2 pole GFI circuit breakers!