ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Top Posters(30 Days)
sparky 4
Recent Posts
2017 NEC Changes
by sparky. 12/13/17 06:57 PM
Dimmable LED 2x4 lay in fixtures
by sparky. 12/13/17 06:31 PM
Casino Wiring methods
by HotLine1. 12/09/17 10:44 AM
Ground wire Size to water Line.
by HotLine1. 12/05/17 12:11 PM
Flexible conduit to an outside Spa
by gfretwell. 12/05/17 12:28 AM
New in the Gallery:
Gallery Test
Popular Topics(Views)
243,033 Are you busy
179,439 Re: Forum
170,387 Need opinion
Who's Online Now
0 registered members (), 19 guests, and 9 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate This Thread
#58767 - 11/17/05 10:25 PM wiring a 3phase convt. to air handler/condensor  
bot540  Offline
Member
Joined: Sep 2004
Posts: 174
Vernon Hills, IL
I need to wire to roof top condensor units and an air handler on two 3phase convertors. My boss provided me with a 7.5hp phase convertor and there was already a 15hp unit there already powering a unit not in use anymore.
I was going to pull #8's to the 15hp unit and feed one condensor unit(20 amps)and the airhandler with #10s. The air handler is single phase and draws about 5 amps but has a 3 phase heating element in it that draws 20 amps.
I'm going to put in a fused disconnect for each,40 amps for the convertor and 30 for the airhandler and 30 for the condensor)
I was then going to use the 7.5hp convertor for the other condensor unit. Fused 30 amps at the panel and at the fused disconnect for the convertor. I was planning on using a non-fused disconnect at the condensor and was going to pull #10s.
On both condensors it says max fuse size 30 amps.
Does this installation sound correct? I already have read article 455 and want to make sure I wire this correctly.


Jesus may have been a capenter,but God was an electrician.Genesis1:3

Work Gear for Electricians and the Trades

#58768 - 11/17/05 10:28 PM Re: wiring a 3phase convt. to air handler/condensor  
bot540  Offline
Member
Joined: Sep 2004
Posts: 174
Vernon Hills, IL
Here is a pdf file if this helps.
http://www.phase-a-matic.com/PDF/RPL-2005-C.pdf


Jesus may have been a capenter,but God was an electrician.Genesis1:3


Member Spotlight
Posts: 165
Joined: March 2007
Show All Member Profiles 
Featured:

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

 

Shout Box
Powered by UBB.threads™ PHP Forum Software 7.6.0
Page Time: 0.012s Queries: 14 (0.003s) Memory: 0.7450 MB (Peak: 0.8608 MB) Zlib enabled. Server Time: 2017-12-14 02:28:38 UTC