PSPV knockout sizes

Discussion about the Power System PV Combiner (PSPV)

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DavidB
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PSPV knockout sizes

Post by DavidB » Wed Oct 20, 2004 2:54 pm

Am I correct that the max knockout size on the PSPV is for 1.5" conduit? If so, what would be the best way to connect 2" conduit?

Kent Osterberg
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Post by Kent Osterberg » Wed Oct 20, 2004 5:13 pm

I don't recommend it, but if you are careful to allow room for a 2" locknut or box adapter, you can connect a 2" conduit to the bottom of the PSPV. You'll probably need to grind down the screw that holds the lid.

By the way, 1/0 wire, the largest that the lugs in the PSPV will accomodate, easily fits in 1.25" conduit.

DavidB
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Post by DavidB » Wed Oct 20, 2004 6:00 pm

I did not think of a reducer to 1.5" but that would work instead of modifying the pspv. The wiring is currently 2 runs of 1/0 with planning for 4 runs. 1.5" would have been enough I believe but the 200+ feet of 2" HDPE conduit I was able to get locally very cheap...

ericwahl
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Re: PSPV knockout sizes

Post by ericwahl » Wed Oct 20, 2004 9:49 pm

DavidB wrote:Am I correct that the max knockout size on the PSPV is for 1.5" conduit? If so, what would be the best way to connect 2" conduit?
I have not had any problem using a slugbuster to knock out for 1 1/2 or 2".

Got mine on ebay for about $130. I couldn't live without it.

DavidB
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Post by DavidB » Thu Oct 21, 2004 7:42 am

Just to clarify, the largest knockout in the PSPV is for 1.25"? for 1.5" conduit I will need to enlarge the knockout?

Kent Osterberg
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Post by Kent Osterberg » Thu Oct 21, 2004 9:49 am

Since the PSPV is designed to accomodate 1/0 wire, you'd expect it to have 1.25" KOs. But, the largest KO is for 1" conduit. You'll need a punch or hole saw to enlarge beyond that. A drawing that shows the KOs is at PSPV Knockout Locations

BTW - generally, reducers aren't a good idea because they make it difficult to feed wire through the conduit. There are bell reducers designed for that purpose, but they are in larger sizes.

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