ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
ShoutChat Box
Recent Posts
Lock-down Thread
by NORCAL - 02/26/21 07:28 AM
Northern Tool Recalls Powerhorse Generators
by Admin - 02/25/21 09:49 PM
You will never guess
by gfretwell - 02/25/21 07:48 PM
New tool
by SMOKEYBOB - 02/15/21 04:59 PM
New in the Gallery:
Facebook follies, bad wiring
FPE in Germany pt.2
Who's Online Now
0 registered members (), 17 guests, and 18 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
Joined: Jun 2007
Posts: 106
M
mr_electrician Offline OP
Member
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
Joined: Jun 2006
Posts: 613
M
mikesh Offline
Member
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:

2020 National Electrical Code
2020 National Electrical
Code (NEC)

* * * * * * *

2020 Master Electrician Exam Preparation Combos
2020 NEC Electrician
Exam Prep Combos:
Master / Journeyman

 

Member Spotlight
Joe Tedesco
Joe Tedesco
Boston, Massachusetts USA
Posts: 2,749
Joined: October 2000
Show All Member Profiles 
Top Posters(30 Days)
MCosta 3
Popular Topics(Views)
275,403 Are you busy
209,295 Re: Forum
196,589 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.7.3