ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals

>> Home   >> Electrical-Photos   >> Classifieds   >> Subscribe to Newsletter   >> Store  
 

Photos of the Week:

Avalon Theatre
Avalon Theatre-1 2 3 4

Random Gallery Image:
Recent Gallery Topics:
What in Tarnation?
What in Tarnation?
by timmp, September 10
Plumber meets Electrician
Plumber meets Electrician
by timmp, September 10
Who's Online Now
0 members (), 281 guests, and 26 robots.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
#79991 02/12/02 08:35 PM
Joined: Feb 2002
Posts: 6
C
cthusky Offline OP
Junior Member
When installing a transfer switch ahead of a main breaker panel,should you bring all available grounding electrode conductors to the transfer switch (listed as suitable for use as service equipment, therefore considered first point of disconect?)and bond right there, then use SER from the transfer switch to the panel? Or is SEU o.k to use from the transfer switch to the panel,considering the panel is usally only a foot or two away??

Horizontal Ad
#79992 02/12/02 08:38 PM
Joined: Jul 2001
Posts: 29
T
Member
Does the transferswitch have a disconnecting means or overcurrent protective device built in?

#79993 02/12/02 08:47 PM
Joined: Feb 2002
Posts: 6
C
cthusky Offline OP
Junior Member
I believe the actual transfer switch is the disconnect. It is labeled as suitable for use as service equipment. It does not contain overcurrent protection though.

[This message has been edited by cthusky (edited 02-12-2002).]

#79994 02/14/02 11:12 AM
Joined: Jan 2002
Posts: 21
M
Member
Cthusky
I’ll try to keep this as short as possible. First look at Service-Equipment in the definitions then section 230.91(NEC 2002) allows the service disconnect to be located immediately adjacent to the overcurrent device (main breaker). Both the transfer switch and the distribution panel are considered service-equipment. 250.24(C) specifies that the grounding electrode conductor be connected to the service-equipment, that could be either the transfer switch or the distribution panel adjacent to the transfer switch, both are consider service-equipment. Either place you land the grounding electrode conductor, only three conductors between the transfer switch and the dist panel is all that is required between the two panels using the Edison three-wire system.

#79995 02/17/02 01:35 PM
Joined: Feb 2002
Posts: 6
C
cthusky Offline OP
Junior Member
Thanks for the reply,I thought though you needed to use SER because of 250-24(a)(5). Since the transfer switch is the bonding point/disconnecting means, using a three wire to the panel from there would mean a "load side connection" of the grounded and grounding conductors.Yes/no


Link Copied to Clipboard
New Page 2
Powered by UBB.threads™ PHP Forum Software 7.7.5