ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Shout Box
Recent Posts
High current GFI vs regular GFCI
by HotLine1. 11/15/18 02:32 PM
This anti-theist is priceless!!!
by djk. 11/14/18 07:19 AM
Single phase and what you call it.
by dsk. 11/12/18 11:10 AM
220/230/240V 60Hz Systems
by Albert. 11/07/18 12:48 AM
New in the Gallery:
What is this for?
Plug terminals
Who's Online Now
0 registered members (), 12 guests, and 30 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
Mixing voltages in the same raceway #77799
07/11/01 07:52 PM
07/11/01 07:52 PM
C
chrispatti  Offline OP
Junior Member
Joined: Jul 2001
Posts: 6
Deltona,Fla. United States
What is the code requirement for combining two different voltages in the same conduit? I have a three phase 480volt compressor unit and a 120volt receptacle to feed at the same location, and I only have one conduit for a homerun. All the conductors in the conduit have the same insulation-THHN. Is this a safe and legal way to install these circuits?

2017 / 2014 NEC & Related Books and Study Guides
Re: Mixing voltages in the same raceway #77800
07/11/01 08:31 PM
07/11/01 08:31 PM
electure  Offline

Member
Joined: Dec 2000
Posts: 4,276
Fullerton, CA USA
Hi,& Welcome!
Yes, I don't like it much, but try NEC 300-3 (c).
Legal, yes.
Safe, probably.
Sound engineering, ??


[This message has been edited by electure (edited 07-11-2001).]

Re: Mixing voltages in the same raceway #77801
07/11/01 08:45 PM
07/11/01 08:45 PM
C
chrispatti  Offline OP
Junior Member
Joined: Jul 2001
Posts: 6
Deltona,Fla. United States
Well thank you for that information. I guess it's just a question of money. Does the contractor pay for two 100ft. runs of EMT or just use one. Me myself I have never combined two different voltages in the same conduit or box for that matter. This is a job that I have just walked on to on Monday.So all the pipework was already done. But thanks again for that code article I will look it up now for future reference.


Featured:

2017 Master Electrician Exam Preparation Combos
2017 NEC Electrician
Exam Prep Combos:
Master / Journeyman

 

Member Spotlight
JoeKP
JoeKP
Berkley, MA
Posts: 144
Joined: March 2008
Show All Member Profiles 
Top Posters(30 Days)
Admin 8
Popular Topics(Views)
251,498 Are you busy
188,680 Re: Forum
178,382 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.6.1
(Release build 20180101)
Page Time: 0.017s Queries: 14 (0.004s) Memory: 0.9515 MB (Peak: 1.0766 MB) Zlib enabled. Server Time: 2018-11-16 05:29:55 UTC