MC Cable [RE-wrenches]

[Bill Brooks]

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William,

MC Connectors are not installed on Tray Cable--They only get installed on
USE-2 Cable. MC Cable is totally different. We need to be very careful with
our use of terms, because they all mean something in the real world. MC
Cable could be used for module-to-module wiring with junction boxes, but the
cable must have conductors rated for wet locations and must be 90C rated,
and the jacket must be grounded (a real pain on any PV module with
non-metallic junction boxes. Therefore the MC Cable must have THWN-2 or
similar wiring inside it. I have never seen this stuff before, but maybe one
or two wrenches have--please share if you know of a source.

Bill.

-----Original Message-----
From: William Miller [mailto:wrmiller at slonet.org] 
Sent: Tuesday, December 21, 2004 11:03 PM
To: RE-wrenches at topica.com
Subject: RE: MC Cable [RE-wrenches]


 


Bill:

I think folks here are referring to MC connectors 
(http://www.multi-contact-usa.com/products/solarline/1),
not MC cable.  The actual cable these connectors are installed onto are 
tray cable?  Beats me, I don't use 'em.

BTW, we remove two perfectly useless cables with MC connectors from every 
Shell panel we install.  Anybody out there want to purchase some?  We were 
sending them back to Shell, but they told us to stop.  We are throwing them 
in the trash.

William Miller




At 08:58 PM 12/21/2004, you wrote:

>Allan,
>
>So which type of cable were you referring to? MC cable is the NEC 
>definition. The PV industry uses MC connectors on USE-2 cable. I 
>thought you were referring to the use of metal-jacketed MC cable. The 
>code says that it can be used in exposed locations if it is marked for 
>wet locations, but I have never seen it used in a PV systems. Do you or 
>anyone else have a source for it?
>
>Bill.

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