About the PVGFP [RE-wrenches]

[jay peltz]

Hi William,

Ah what a strange world it is no?

I can say that AEE has a NEMA 1 box for the GFI.  Part #53-531-167.

Thanks and I agree.

jay peltz
peltz power

William Miller wrote:

> Friends:
>
> I've put in several of the PVGFP circuit breakers from Trace.  I have some
> questions about installing this unit:
>
> There is a white lead, about 2/0, that connects to the isolated negative
> buss and a green lead that looks slightly smaller, that connects to the
> bonded buss.  In the manual it says that these leads can be lengthened or
> shortened but can not be replaced.  It goes on to say that these leads
> "have been factory installed and torqued to UL standards."  Furthermore the
> manual says, "NEC does not allow field connections of two wires (over 12
> AWG) in one pressure terminal."  Inspection of these units shows that there
> are two leads, one of the heavy ones described above, and a smaller lead in
> each lug on the 1 amp pole of the breaker.
>
> What I get out of this is that a factory can put two wires in one lug but a
> field installer cannot.  It can be awkward to have to splice onto one or
> both of these leads and the temptation is to replace the lead with a longer
> one.  If the torque is so critical, I do not understand why the manual
> says, "Periodic tightening of all wire connections... is highly
> recommended."  Also, why is there such heavy gauge wire connected to a 1
> amp circuit breaker?  Am I required to add wire of the same gauge?
> Comments are requested.
>
> On the same subject, does anyone think it odd that these breakers cannot be
> purchased with an enclosure?  I accidentally discovered that a Murray
> LC008DS load center is a great enclosure for the PVGFP, either in the Nema
> 1 or Nema 3R style.  One just removes the interior and screws or rivets in
> the GFP breaker.  For the 3 pole or less breakers (actual poles) one can
> use the breaker KOs as they are.  For the 4 pole model, you have to knock
> out on both sides of the center and cut out the center web and then supply
> a small plate to block the side of the larger opening.  What are the rest
> of you doing for enclosures for the PVGFPs?
>
> Also, I called Trace to ask what to use for an isolated negative buss.
> They suggested a DCBB on a piece of wood!  I did some research and found
> that the Ilsco PDB-24-500-1 power distribution block fit (snugly) into a
> DC250 and worked well as an isolated negative.  I can send a photo of
> anyone is interested.
>
> Which brings me to another complaint, that of how small the DC250
> enclosures are...  But I'll save that for another post.
>
> Thanks in advance for your comments.
>
> William Miller
>
> __________________________________________________________________
> William Miller
> SLO Communications: Communications and Power Systems Consulting
> Chief Engineer, KCBX: NPR and PRI for San Luis Obispo and Santa Barbara
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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  The Email You Want. http://www.topica.com/t/16
Newsletters, Tips and Discussions on Your Favorite Topics