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control transformer #34588
02/16/04 05:03 PM
02/16/04 05:03 PM
J
jbfan  Offline OP
Member
Joined: Feb 2003
Posts: 69
Newnan, GA
Do I need to bond the neutral of a 208v to 120v control transformer. The panel that feeds the transformer has the ground and neutral bonded inside the panel. It is a 500va transformer.

Thanks


"Yes I am a Pirate, 200 years to late" Jimmy Buffett
Work Gear for Electricians and the Trades
Re: control transformer #34589
02/16/04 05:30 PM
02/16/04 05:30 PM
G
golf junkie  Offline
Member
Joined: Apr 2001
Posts: 507
York, NE
No, You can bond it or let it float at your option. I prefer to bond it...it makes voltage reading to ground more meaningful, makes troubleshooting easier.

GJ

[This message has been edited by golf junkie (edited 02-16-2004).]

Re: control transformer #34590
02/16/04 06:53 PM
02/16/04 06:53 PM
B
Bjarney  Offline
Moderator
Joined: Apr 2002
Posts: 2,527
West-Southern Inner-Northeast ...
Please consider grounding the 120V-secondary winding. For 1000VA-and-under control-power transformers, NEC 250-30 allows the winding to be grounded with a simple 'case' jumper. The usual full-tilt grounding-electrode/building-steel connection is not needed. This is a real easy way to keep electrostatically-induced garbage off the control circuit.




[This message has been edited by Bjarney (edited 02-16-2004).]

Re: control transformer #34591
02/16/04 07:53 PM
02/16/04 07:53 PM
J
jbfan  Offline OP
Member
Joined: Feb 2003
Posts: 69
Newnan, GA
Thanks for the answers. It will be bonded tomorrow!


"Yes I am a Pirate, 200 years to late" Jimmy Buffett
Re: control transformer #34592
02/16/04 09:19 PM
02/16/04 09:19 PM
Scott35  Offline

Broom Pusher and
Member
Joined: Oct 2000
Posts: 2,708
Anaheim, CA. USA
I second Bjarney's suggestion!

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Scott35


Scott " 35 " Thompson
Just Say NO To Green Eggs And Ham!

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