[RE-wrenches] Concentrics at 250 volts plus

[William Miller]

Kelly:

 

Just as I suspected.  I wish you could be here to share the lunch I have
earned on my bet.

 

Thanks,

 

William

 

 

Gradient Cap_mini
Lic 773985
 <http://www.millersolar.com/> millersolar.com
805-438-5600

 

From: RE-wrenches [mailto:re-wrenches-bounces at lists.re-wrenches.org] On
Behalf Of Kelly Larson
Sent: Monday, July 14, 2014 10:16 PM
To: RE-wrenches
Subject: Re: [RE-wrenches] Concentrics at 250 volts plus

 

Hi William,

 

The requirement for bonding on BOTH ends comes when the wire though the
conduit is a GEC.  For EGC, just one end of the conduit is sufficient.


Blessings,

Kelly

 

 

~~~~~

Kelly Larson

707-223-3209

 

Box 504
Ukiah, CA 95482
Electrical Engineer

NABCEP Certified Solar PV Installation Professional

IREC Certified Master Trainer for Photovoltaic Installer
CA Electrical Contractor# 868189

SolarKelly.com

 

On Jul 14, 2014, at 3:11 PM, William Miller wrote:





Friends:

Please help us settle a crew debate before we come to blows:  for circuits
250 volts and higher, do we need to bond EMT at both ends?  Or, if there is
bonded cabinet with a concentric on one end and a solid, bonded metal
cabinet on the other, do we need a bonding bushing on the concentric end?

I say a conduit needs to be bonded only on one end. My misguided employee
says both ends. Both cabinets are independently bonded.

Thanks in advance. 

William
Miller Solar
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