ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
ShoutChat Box
Recent Posts
Lock-down Thread
by HotLine1 - 04/19/21 02:39 PM
Where is Everyone?
by gfretwell - 04/17/21 07:32 PM
Upside Down ThreeWay
by Trumpy - 04/17/21 06:25 AM
Thought this was funny
by Trumpy - 04/17/21 06:22 AM
How's all our Non-US folks doing?
by Trumpy - 04/17/21 05:37 AM
New in the Gallery:
Facebook follies, bad wiring
FPE in Germany pt.2
Who's Online Now
0 registered members (), 15 guests, and 14 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
Grounded metal cabinet? #220962 09/10/20 08:13 AM
Joined: Sep 2020
Posts: 1
S
Same Offline OP
New Member

My understanding is that metal cabinet needs to be grounded to the common or neutral 3 wire.

Questions:

When is 3 wire required and when 2?

Why are some plastic cabinets polarized 2 wire or 3 wire?

Why is this metal cabinet space heater that im try to fix, why its 2 wire and neither is common grounded to its metal cabinet?

2017 / 2014 NEC & Related Books and Study Guides
Re: Grounded metal cabinet? [Re: Same] #220964 09/10/20 12:19 PM
Joined: Apr 2002
Posts: 7,238
HotLine1 Online Content
Member
Short answer is,

Metal enclosures are required to be 'bonded'.

NOT to the neutral conductor, except in MOCP equipment.

The other questions can be answered by you reading a book on basic electricity.

You may want to consult a Qualified Electrical Contractor regarding the space heater as you may be endangering yourself or your property by attempting to DIY.

I am closing this thread as the forum rules do not allow DIY.


John

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
akmaster
akmaster
alaska
Posts: 74
Joined: June 2012
Show All Member Profiles 
Top Posters(30 Days)
Trumpy 11
BigB 1
Popular Topics(Views)
277,947 Are you busy
211,408 Re: Forum
198,463 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.7.3