Help please

[masterinbama]

I am out of town and am having a small issue on a project back home. It has to do with the 2002 NEC and article 724 I believe. It's the article that deals with line isolation transformers and voltage drop. If someone could jog my very clouded memory on this subject I would appreciate it very much.

 

[augie47]

There is no Art 724 in 2002

 

[masterinbama]

I was going from memory All I know is it deals with voltage drop and isolation transformers. The transformer I have installed is a 120 volt to 120 volt with 60 volts per leg to ground and 120 volts line to line. I just need a little memory jog for when i talk to the inspector.

 

[augie47]

possibly Art 647...
ARTICLE 647 Sensitive Electronic Equipment
647.4 Wiring Methods.

(D) Voltage Drop. The voltage drop on any branch circuit shall not exceed 1.5 percent. The combined voltage drop of feeder and branch-circuit conductors shall not exceed 2.5 percent.
(1) Fixed Equipment. The voltage drop on branch circuits supplying equipment connected using wiring methods in Chapter 3 shall not exceed 1.5 percent. The combined voltage drop of feeder and branch-circuit conductors shall not exceed 2.5 percent.

 

[masterinbama]

That's it. Thanks Augie. I find as I get older it's taking more slaps to the head to shake information loose.

 

[G0049]

I find as I get older it's taking more slaps to the head to shake information loose.

Well then, get a wife like the rest of us who need their memory jogged once in a while. Beats slappin' youreself in the head!:grin: