ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Shout Box
Recent Posts
AreMetal Ladders Ever OK For Electrical Work?
by HotLine1. 01/22/18 07:31 PM
Photocell
by twh. 01/22/18 05:06 PM
VDE 0100 to introduce AFCIs
by sparky. 01/20/18 05:09 PM
MRI LED lights dimmer control replacement - wow!
by Potseal. 01/19/18 08:52 PM
New in the Gallery:
Housebilding DIY wiring
SE cable question
Who's Online Now
0 registered members (), 11 guests, and 7 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
probably a stupid question but....... #165425
06/27/07 01:36 PM
06/27/07 01:36 PM
M
mr_electrician  Offline OP
Member
Joined: Jun 2007
Posts: 106
London, Ontario
Hi, I just want to clear the mud when it comes to ground/phase detection lights. When do you need them, and are they needed when the service it is connected to is 3 wire 600V fed from a 4 wire distribution?


Never trust an electrician with no eyebrows!!
Tools for Electricians:
Re: probably a stupid question but....... [Re: mr_electrician] #165435
06/27/07 06:16 PM
06/27/07 06:16 PM
M
mikesh  Offline
Member
Joined: Jun 2006
Posts: 613
Victoria, BC, Canada
They are required for ungrounded systems. A 240 volt delta secondary for example.
A 600 volt from a wye connected 4 wire secondary requires you bring the grounded conductor to the service box and bond it and ground it. Thereafter you don't need to carry the neutral unless 347 volts is needed. The ground detector lights are not required in the second case as any phase conductor contacting a grounded enclosure will pop a fuse or breaker.


Featured:

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

 

Member Spotlight
lil suzi
lil suzi
Midwest
Posts: 57
Joined: August 2003
Show All Member Profiles 
Top Posters(30 Days)
Admin 21
sparky 15
Potseal 15
Popular Topics(Views)
243,596 Are you busy
180,394 Re: Forum
170,865 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.6.1
(Release build 20180101)
Page Time: 0.012s Queries: 15 (0.003s) Memory: 0.9409 MB (Peak: 1.0594 MB) Zlib enabled. Server Time: 2018-01-23 02:22:19 UTC