Thread: Branch wire - grounding conductor

This picture is not very clear, but it is an older house 1960 with green braided branch wire. The grounding conductor is smaller than the hot-neutral conductors. I know this was OK way-back then, but is it something to be concerned about today? The outlets where changed to three prong type and all test OK with the smaller ground wire.

If this is a problem, what should I report to client?

I would not be concerned about the undersized grounding conductor. I would be more concerned whether they properly grounded the receptacles to the boxes. If the light on the tester indicating that the receptacle is grounded was as bright as the other light, then its probably ok.

Is that photo upside down or is that main breaker upside down?

Originally Posted by Brad Richter

Is that photo upside down or is that main breaker upside down?

It used to be allowed to be that way, it is no longer code compliant, think it went away in the late 1970's. The reduced grounding conductor went away in the 1968 or1975NEC. Edit: The requirement was 240.81 in the 1975 NEC requiring "ON" to be up when a circuit breaker is in the vertical position.

Originally Posted by Mark Reinmiller

I would not be concerned about the undersized grounding conductor. I would be more concerned whether they properly grounded the receptacles to the boxes. If the light on the tester indicating that the receptacle is grounded was as bright as the other light, then its probably ok.

Originally Posted by Rollie Meyers

It used to be allowed to be that way, it is no longer code compliant, think it went away in the late 1970's. The reduced grounding conductor went away in the 1968 or1975NEC. Edit: The requirement was 240.81 in the 1975 NEC requiring "ON" to be up when a circuit breaker is in the vertical position.

OK. So if it we shouldn't be concerned about it, why was the code changed?? It was most likely changed because of a safety or fire issue. This type of wire isn't allowed in homes anymore for a good reason.

If we see solid aluminum branch wire in homes, or we see Non-GFCI outlets in damp or wet areas we call it out, even though these were not code issues prior to 60-70's. Why do we call these out in homes of all ages? It seems like we are not consistent. Don't you think we should be consistent or should we just hit the hot buttons that the insurance industry harps on us about.

MMM! Just some food for thought and maybe some healthy debate.

The main is OFF in the picture.

Originally Posted by Ken Amelin

OK. So if it we shouldn't be concerned about it, why was the code changed?? It was most likely changed because of a safety or fire issue. This type of wire isn't allowed in homes anymore for a good reason.

If we see solid aluminum branch wire in homes, or we see Non-GFCI outlets in damp or wet areas we call it out, even though these were not code issues prior to 60-70's. Why do we call these out in homes of all ages? It seems like we are not consistent. Don't you think we should be consistent or should we just hit the hot buttons that the insurance industry harps on us about.

MMM! Just some food for thought and maybe some healthy debate.

When calling out a damp area without GFCI in an old home, the call out is done as a safety suggestion. If a GFCI were to be installed, then if it was done to current code compliance, running a ground wire would be required. However, since a GFCI will safely disconnect an unbalanced load without an earth ground, it will be effective as a safety device when installed without a corresponding wiring upgrade. The ground wire guarantees the appliance cabinet is not energized (above ground potential), should an unbalanced load not be detected by the GFCI.

As for the undersize ground wire, which was code compliant when installed, the circuit load would have to exceed the capacity of the ground wire, before a safety condition would exist. The code was upgraded to require a path to ground, equal to the phase conductor, to remedy those rare situations when the ground load exceeded the ground wire capacity, compared to the phase conductor capacity.

Originally Posted by Bruce Low

The main is OFF in the picture.

No it is not.

I stand corrected. Initially it appeared to be the type that hides the on or off but I now see that the top sliver of "on." The position of the switch is difficult to discern in the photo.

Originally Posted by Ken Amelin

OK. So if we shouldn't be concerned about it, why was the code changed?? It was most likely changed because of a safety or fire issue.

That is true for a long, very long, list of code changes. Are you going to list them all in your report for the 1960's house?

Originally Posted by Ken Amelin

This type of wire isn't allowed in homes anymore for a good reason.
If we see solid aluminum branch wire in homes, or we see Non-GFCI outlets in damp or wet areas we call it out, even though these were not code issues prior to 60-70's.

It is a hazard to a lesser degree, no doubt. Raymond recently found cloth and paper insulation that was rotting away on the wiring in a damp basement. So old wiring does have some safety issues and it is not getting better with age.

I think as time goes by and client awareness goes up we will be reporting even more of this old stuff as due for replacement. The chimney and water pipes are old too.