Early 80s gfi breaker internals

[letgomywago]

Well not much different than a new one but it has a full size resistor. The square D ones from the Era were wide body I think so about the same space requirements.

 

[ptonsparky]

Dang, I've never autopsied a GFCI.

 

[letgomywago]

Dang, I've never autopsied a GFCI.

I've seen clear promotional ones and they look just like this one.

 

[ptonsparky]

The bubbled coil on this AFCI may explain why it won't trip via Test button.

 

[letgomywago]

View attachment 2569896
The bubbled coil on this AFCI may explain why it won't trip via Test button.

Maybe. Was it damaged when you cut it open though.

 

[ptonsparky]

I applied no heat, so, No I didn't do it.

 

[ptonsparky]

It does make me wonder when it failed and why. Before or When I pushed Test.

I have two more unopened failures.

 

[ptonsparky]

The issue appears to be the tripping coil in two of the three. IDK on the rt one above. coil appears good.

 

[don_resqcapt19]

If that is the test resistor it seems like it should be brown/blue/white/red (16.9k). Looks like it is brown/blue/white/orange (169k)

 

[LarryFine]

If that is the test resistor it seems like it should be brown/blue/white/red (16.9k). Looks like it is brown/blue/white/orange (169k)

I see blue/white/orange/gold, which is 69K, 5%.

 

[ptonsparky]

I see blue/white/orange/gold, which is 69K, 5%.

That's what I see.

Now Mr Letgo needs to confirm it with his handy ohm meter.

 

[don_resqcapt19]

I see blue/white/orange/gold, which is 69K, 5%.

Yes I was looking at the body as the first band, but, if that is the test resistor, it should be around 17k.

 

[letgomywago]

I'd Already tossed it in the trash bin before I saw the posts asking for an ohm reading. Looking at the picture in my phone it shows as
Black blue grey orange gold brown. Which is a 68k ohm. I'm not sure why that's different than a modern one at 16k. But in the past gfis just needed to be more sensitive than 5ma of leakage current so 1.7ma would be allowed. Now it's 5ma+-1 so it wouldn't fly now obviously. A 16k one would work for a gfi of that modern tolerance pushing about 7ma.

 

[don_resqcapt19]

I'd Already tossed it in the trash bin before I saw the posts asking for an ohm reading. Looking at the picture in my phone it shows as
Black blue grey orange gold brown. Which is a 68k ohm. I'm not sure why that's different than a modern one at 16k. But in the past gfis just needed to be more sensitive than 5ma of leakage current so 1.7ma would be allowed. Now it's 5ma+-1 so it wouldn't fly now obviously. A 16k one would work for a gfi of that modern tolerance pushing about 7ma.

It will always have to be sized to flow at least 6 mA at 85% of the rated voltage per UL 943.

 

[letgomywago]

It will always have to be sized to flow at least 6 mA at 85% of the rated voltage per UL 943.

OK so when did that listing come about so strictly. I heard around 2000 was when it changed but am unsure.

 

[LarryFine]

Looking at the picture in my phone it shows as
Black blue grey orange gold brown.

There is no black (0) first band. You're actually seeing the inside of the case behind the resistor lead.

 

[letgomywago]

There is no black (0) first band. You're actually seeing the inside of the case behind the resistor lead.

OK

 

[rambojoe]

I see blue/white/orange/gold, which is 69K, 5%.

Close enough, 68k... its grey not white...

 

[ptonsparky]

It's white, not grey.

 

[rambojoe]

It's white, not grey.

Sounds good.