QO Breakers and Panels [RE-wrenches]

[Bill Brooks]

Very interesting. What is an NQOD panel? What is so special about it that it
makes the breaker that much better? I would like the contact name if you
have it.

Bill.


-----Original Message-----
From: William Miller [mailto:wrmiller at slonet.org]
Sent: Tuesday, March 06, 2001 10:42 PM
To: RE-wrenches at topica.com
Subject: Re: QO Breakers and Panels [RE-wrenches]


Friends:

Here is some new info I am not sure I shared with this group.  My apologies
if this particular point is a repeat.

A rep. from Square D told me they tested and will certify QO breakers in an
NQOD panel to 125 volts DC.  If you purchase an NQOD panel with QO
breakers, they will send a certificate stating that these breakers are OK
to use up to 125 VDC.  I have the persons name and the date we spoke in my
notes, if anyone needs this data.

William




At 07:58 AM 3/6/01 -0800, you wrote:
>Hi Travis,
>
>Square-D QO breakers....up to the 70 amp size are rated for use up to 50
>volts DC. That's why they're quite iffy for use in 48 volt
>systems.....you'll wind up over the 50 volts frequently if you're doing it
>right! As for the breaker's DC approval...it's got to do with the AIR
>rating of the QOs. To the best of my knowledge, the HOM type breakers do
>not have the DC rating.
>
>Look on page 57 of Wiles' Sandia Handbook, under Distribution
>Systems....that discusses the QO breaker rating. And I've had several
>systems with the QO DC load center pass inspection with flying colors....no
>problemo!
>
>Hope this helps a bit.
>
>Roy Butler
>Four Winds RE
>
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To send a message:
 RE-wrenches at topica.com

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 http://www.topica.com/lists/RE-wrenches/

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 http://www.mrsharkey.com/wrenches/etiquete.htm

To unsubscribe send a message to: 
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To check out the other RE-Wrench participants:
 www.mrsharkey.com/wrenches/index.html

Hosted by Home Power magazine: 
 www.homepower.com

For info contact list moderator by email:
 michael.welch at homepower.com

____________________________________________________________
T O P I C A  -- Learn More. Surf Less. 
Newsletters, Tips and Discussions on Topics You Choose.
http://www.topica.com/partner/tag01