romex in met-metered installations [RE-wrenches]

[Bill Brooks]

-----------------------------------------------------------
Give Your Team Access to Their PCs from Anywhere. Increase 
productivity with a secure remote-access solution from 
GoToMyPC Pro. Stay in touch with your office. FREE TRIAL:
http://click.topica.com/caaciqXbz8Qcsbz9JC9a/ExpertCity
-----------------------------------------------------------

Kirk,

There is no code prohibition to using NM-B inside the building as you
suggest. However, in the 2002 NEC there needs to be a disconnect, either
outside in a readily accessible location or at the nearest point after
entering the building. This causes some real problems as has been discussed
in previous posts.

The other problem with NM is that of identifying it within the building. It
must be clearly tagged and labelled to reduce the chance that an electrician
would choose to cut into the PV cable to make a splice, thinking it to be a
standard branch circuit.

In the 2005 NEC, the disconnect requirement will be waived for wiring that
is in metal raceway. This suggests that armoured cable (type MC) is the most
cost effective method of running small PV conductors through a house.

Bill.


-----Original Message-----
From: Kirk Herander [mailto:kirk at vtsolar.com]
Sent: Tuesday, June 01, 2004 4:34 PM
To: RE-wrenches at topica.com; RE-wrenches at topica.com
Subject: romex in met-metered installations [RE-wrenches]

Group,

I'm wondering about the merits of this. Can romex be used between
high-voltage DC arrays and the inverter?  NM-B is rated for 600v and 90
degrees c, according to NEC 334.112. I'm not talking outdoors of course, but
from an array junction box(use-2 from array to j-box) in the attic down to
the basement where the DC disconnect is located, then stranded thhn to the
inverter input. Even if it can be used, should it be used? It just doesn't
seem quite right. It cannot be used as service entrance cable. This is a
single-family residence I'm talking about.


Vermont Solar Engineering
Kirk Herander
North American Board of Certified Energy Practitioners
Certified Solar PV Installer(TM)
Xantrex Certified Dealer Charter Member
NYSERDA-eligible installer
Vermont Solar and Wind Partner

PO Box 697
Burlington, VT. 05402
www.vermontsolar.com
www.backeastsolar.com
800.286.1252 - 802.863.1202
fax 802.863.7908

-----------------------------------------------------------
Empower your Team with Remote Access. GoToMyPC Pro
provides your organization with instant remote access to
email,files, applications and network resources in real
time. FREE TRIAL:
http://click.topica.com/caaciqTbz8QcsbaaVcJf/ExpertCity
-----------------------------------------------------------


- - - -
To send a message: RE-wrenches at topica.com

Archive of previous messages: http://lists.topica.com/lists/RE-wrenches/read

List rules & etiquette: www.mrsharkey.com/wrenches/etiquete.htm

Check out participant bios: www.mrsharkey.com/wrenches/

Hosted by Home Power magazine

Moderator: michael.welch at homepower.com

-----------------------------------------------------------
Let University of Phoenix make 2004 your year. Evening, 
weekend or FlexNet® classes – over 130 locations. Look 
into our programs and get the degree that gets you going!
http://click.topica.com/caaciq1bz8Qcsbz9JC9f/UOP
-----------------------------------------------------------




- - - -
To send a message: RE-wrenches at topica.com

Archive of previous messages: http://lists.topica.com/lists/RE-wrenches/read

List rules & etiquette: www.mrsharkey.com/wrenches/etiquete.htm

Check out participant bios: www.mrsharkey.com/wrenches/

Hosted by Home Power magazine

Moderator: michael.welch at homepower.com
--^----------------------------------------------------------------
This email was sent to: michael.welch at homepower.com

EASY UNSUBSCRIBE click here: http://topica.com/u/?bz8Qcs.bz9JC9.bWljaGFl
Or send an email to: RE-wrenches-unsubscribe at topica.com

For Topica's complete suite of email marketing solutions visit:
http://www.topica.com/?p=TEXFOOTER
--^----------------------------------------------------------------