I need to install a 240 volt to 120 volt step down transformer...my problem is on the secondary side for 120 volts I need one hot and a neutral....and my question is should I ground one of the secondary legs to make it a neutral and use that for my ground also ????? if anyone can let me know either way or the correct way I would be happy.....
Wiring 240v to 120v transformer for grounding
- Thread starter msilva
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- Massachusetts
Re: Wiring 240v to 120v transformer for grounding
Yes you must ground one of the new conductors.
Look at 250.30 for he rules, you have a separately derived system.
Yes you must ground one of the new conductors.
Look at 250.30 for he rules, you have a separately derived system.
crossman
Senior Member
- Location
- Southeast Texas
Re: Wiring 240v to 120v transformer for grounding
But that does not make it a neutral!!
But that does not make it a neutral!!
- Location
- Massachusetts
Re: Wiring 240v to 120v transformer for grounding
Nope I did not say it would.Originally posted by crossman:
crossman
Senior Member
- Location
- Southeast Texas
Re: Wiring 240v to 120v transformer for grounding
I knew you knew! I was just making the point for the originator of the thread.
I knew you knew! I was just making the point for the originator of the thread.
Re: Wiring 240v to 120v transformer for grounding
you see that one of the guys at the shop is the one that asked me this question and I am assuming that the transformer he used single phase in (240 volts) and two wires on the secondary side he did ground one of the legs on the secondary side .He needed a neutral and used that grounded end as a neutral I am just wondering if it was correct to use it as a neutral....I did look at 250.30 and all it saids that having an SDS you do need a common ground for a SDS...am I reading it right or should I read it carefully.....
you see that one of the guys at the shop is the one that asked me this question and I am assuming that the transformer he used single phase in (240 volts) and two wires on the secondary side he did ground one of the legs on the secondary side .He needed a neutral and used that grounded end as a neutral I am just wondering if it was correct to use it as a neutral....I did look at 250.30 and all it saids that having an SDS you do need a common ground for a SDS...am I reading it right or should I read it carefully.....
physis
Senior Member
Re: Wiring 240v to 120v transformer for grounding
No. it's not a neutral so it can't be used as one.
But:
If it's a two wire secondary and one wire is grounded then the grounded wire of the secondary is used as any other grounded conductor would be. If that makes sense.
Bob and Crossman'
I was gonna say something too but I knew you both knew!
[ January 25, 2005, 08:15 PM: Message edited by: physis ]
No. it's not a neutral so it can't be used as one.
But:
If it's a two wire secondary and one wire is grounded then the grounded wire of the secondary is used as any other grounded conductor would be. If that makes sense.
Bob and Crossman'
I was gonna say something too but I knew you both knew!
[ January 25, 2005, 08:15 PM: Message edited by: physis ]
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