ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
ShoutChat
Recent Posts
Square D "All-In-One" Panelboard
by NORCAL - 11/30/21 12:48 PM
Where is Everyone?
by luckyshadow - 11/21/21 10:14 AM
It's been an interesting career
by The Watt Doctor - 11/19/21 09:56 AM
Well I am back to stay (nearly 6 years)
by The Watt Doctor - 11/19/21 09:17 AM
Motor Load Relationships Between Fans and Pumps
by The Watt Doctor - 11/18/21 09:24 AM
New in the Gallery:
240/208 to a house
240/208 to a house
by wa2ise, October 9
Now you know.
Now you know.
by Tom_Horne, September 7
Who's Online Now
1 members (Scott35), 48 guests, and 19 robots.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
#183467 01/10/09 11:42 AM
Joined: Jan 2005
Posts: 316
L
Member
I'm curious of those that install gear that requires Ground Fault Protection by the NEC - How many of you have the GFP tested after installation? Required by 230.95 C ( 2005 nec)

Last edited by luckyshadow; 01/10/09 11:43 AM.
2017 / 2014 NEC & Related Books and Study Guides
Joined: Jan 2004
Posts: 1,507
G
Member
Absolutely - It's required by the NEC and the manufacturer. I always ask for the engineers spec on where he wants the trip point, I witness the performance test as administered by the company performing the test and then sign the document that goes on record as compliance with 230.95(C).

For the record, pushing the Test button on the equipment is not acceptable as the "Performance Test"

In my career as an inspector (25 years) I have had 2 systems that did not past the first time.


George Little
Joined: May 2007
Posts: 7
B
New Member
We perform secondary injection testing of GFP systems for ECs and over the years (25-28) I have had countless GFP systems fail the initial test.

We test the GFP relay at all factor presets for current pickup and at a timed operation at the settings recommended in the coordination study (if supplied). We also test (megger) the neutral for any grounds downstream of the main service, megger the bus line and load and ductor/micro-ohm the power contacts. Lastly we recommended leaving the main line switch closed (as do manufactures) during construction till power is to be connected and recommended leaving the GFP relay set at minimum current and time delay for minimizing possible damage to equipment during construction.

Last edited by Brian_John; 01/19/09 05:02 PM.

Link Copied to Clipboard
Featured:

Tools for Electricians
Tools for Electricians
 

* * * * * * *

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

 

Member Spotlight
mxslick
mxslick
Atomic City, ID USA
Posts: 806
Joined: October 2004
Top Posters(30 Days)
Admin 3
dsk 2
Popular Topics(Views)
286,451 Are you busy
218,868 Re: Forum
204,978 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.7.5