gfci

[Markinstin]

GFCI receptacles are one of 2 legal (code) ways of replacing receptacles in a 2 wire system

#1 is a 2 wire receptacle (never to be used in wet locations)

#2 is a GFCI ok now you know

the way a gfci works is simple it measures the current flow in and out on the hot and neutral if it is different it trips so if some voltage is drained off to another grounding point the GFCI trips easy right just an electrical teeter totter.

(master Electrician 33 years) Inspector 8 years[:-magnify

[chicago]

Hi ..Mark and welcome back.

Must say I never saw anybody play football on someones roof up till now.

[aelliott]

Can you install a GFCI receptacle legally in an old two wire system?

[Jim Katen]

Originally posted by aelliott

Can you install a GFCI receptacle legally in an old two wire system?

Certainly they can.

The NEC specifically allows it in 406.3(D)(3)

- Jim Katen, Oregon