GFCI 3G to 2G
#1
Member
Thread Starter
GFCI 3G to 2G
So - have a wiring question about going from a 4 wire (3+G) cable to a 3 wire (2 +G) cable.
As is there is a designated circuit which comes from the breaker (double pole) with 3+G (Old cable, red, white, black and G) to an outlet.
The cable OUT of the outlet other side goes to a dishwasher - and is a 2+G cable.
In the box, the red (from 3G) and the black (from 2G) are connected with a wire nut. The black and white from the 3g and the white from the 2g are connected to the outlet.
I was going to replace the outlet with a 20A GFCI - but hadn't realised until I got in there that there was a 3+G cable which the wiring instructions say not to use.
Can I wire in the GFCI the same way as the previous outlet?
As is there is a designated circuit which comes from the breaker (double pole) with 3+G (Old cable, red, white, black and G) to an outlet.
The cable OUT of the outlet other side goes to a dishwasher - and is a 2+G cable.
In the box, the red (from 3G) and the black (from 2G) are connected with a wire nut. The black and white from the 3g and the white from the 2g are connected to the outlet.
I was going to replace the outlet with a 20A GFCI - but hadn't realised until I got in there that there was a 3+G cable which the wiring instructions say not to use.
Can I wire in the GFCI the same way as the previous outlet?
#2
Welcome to the forums.
Yes... you can install a GFI receptacle in that location as it's after the MWBC split.
The red and white are still carried thru and out to another location.
The black and white will feed your GFI receptacle.
Of utmost importance.... make sure the neutral is a GOOD splice.
You don't want the neutral splice to open in operation.
That should be the black and white from the 2g.
Yes... you can install a GFI receptacle in that location as it's after the MWBC split.
The red and white are still carried thru and out to another location.
The black and white will feed your GFI receptacle.
Of utmost importance.... make sure the neutral is a GOOD splice.
You don't want the neutral splice to open in operation.
The black and white from the 3g and the white from the 2g are connected to the outlet.
hiluxsurf
voted this post useful.
#3
Member
Thread Starter
Thanks Pete - for the super speedy response!
I'm not sure I understand - could I clarify please?
Currently the Red from supply is connected by wire nut to the black that carries through to the dishwasher outlet (see picture attached)
When you say 'the black and white from the 2g' should be connected to the outlet - where would the red from the supply be connected to?
And one other question;
I'd like to add another outlet , between the washer GFCI and the dishwasher - which will be nearer the Laundry sink. I know I COULD use a non GFCI outlet as long as protected by the upstream GFCI outlet - but presumably no harm making the second outlet GFCI as well?
I'm not sure I understand - could I clarify please?
Currently the Red from supply is connected by wire nut to the black that carries through to the dishwasher outlet (see picture attached)
When you say 'the black and white from the 2g' should be connected to the outlet - where would the red from the supply be connected to?
And one other question;
I'd like to add another outlet , between the washer GFCI and the dishwasher - which will be nearer the Laundry sink. I know I COULD use a non GFCI outlet as long as protected by the upstream GFCI outlet - but presumably no harm making the second outlet GFCI as well?
#4
Your description was a little unclear.
Take the white wires off the shown receptacle and make them into a splice.
You want a short tail to go from that splice to the shown receptacle.
Yes you can add a GFI receptacle to the black and white shown on the right side.
Take the white wires off the shown receptacle and make them into a splice.
You want a short tail to go from that splice to the shown receptacle.
Yes you can add a GFI receptacle to the black and white shown on the right side.
hiluxsurf
voted this post useful.
#5
Member
Thread Starter
Thank you so much Pete - this has been driving me nuts all day.
Presumably in your illustration both outlets can be GFCI?
And no issue going out from one outlet to the dishwasher outlet?
(my crappy drawing for clarity of what I mean)
Really appreciate your assistance.
Presumably in your illustration both outlets can be GFCI?
And no issue going out from one outlet to the dishwasher outlet?
(my crappy drawing for clarity of what I mean)
Really appreciate your assistance.
#6
Yes.... both receptacles can be GFI.
After the circuit splits.... you have two completely independent circuits and can do whatever you want with them.
After the circuit splits.... you have two completely independent circuits and can do whatever you want with them.
hiluxsurf
voted this post useful.