120 v circuit in a 240 v 3 phase panel, no neutral

[meternerd]

Are you even sure that it's a 4W Delta service with a "center tapped", grounded winding? Seems strange they wouldn't run a neutral. If it doesn't have a center tapped 240/120 transformer in the bank, you'll have to get a neutral wired at the transformer bank. That may involve the POCO. If it's a corner grounded Delta, you've got even bigger problems. Maybe I just didn't understand all of the posts, so if my comments are stupid, forget it....I won't be offended (much).

 

[kwired]

Are you even sure that it's a 4W Delta service with a "center tapped", grounded winding? Seems strange they wouldn't run a neutral. If it doesn't have a center tapped 240/120 transformer in the bank, you'll have to get a neutral wired at the transformer bank. That may involve the POCO. If it's a corner grounded Delta, you've got even bigger problems. Maybe I just didn't understand all of the posts, so if my comments are stupid, forget it....I won't be offended (much).

It was a sub panel within the building - service is very likely to have a neutral supplying it. That sub panel probably had no need for a neutral when it was installed, or could even originally been a branch circuit that didn't need a neutral that someone made into a feeder at some point.

I've seen ball field lighting where they never ran neutrals to the light poles - no need to as the lighting was 240 volts. Then someone involved with the operations wants a 120 volt receptacle on a pole for some reason - A good electrician tells them it will cost more then a breaker and a receptacle, so they hire a handyman or do it themselves and you end up with neutral current on the EGC.

 

[domnic]

Number one rule

Number one rule

The number one rule in electrical work. positively identify what you are working on. ( should be/ most likely/probably) will get YOU in trouble.