Need help wiring 5HP pressure washer

[strutaeng]

Hello guys, I'm thinking of wiring a homemade pressure washer I built several years ago.

I had a Baldor L3708T laying around and decided to make a pressure washer with a CAT pump I bought for it. The specs on the motor are:

5HP
23A

I've got a CuttlerHammer GFCI breaker (I think it was intended for a hot tub or spa) as a "switch" mounted on the unit.

I don't have a magnetic starter, but have thought about adding one. Would I just hardwire the magnetic starter with a simple 120/240V switch? Do I even need the GFCI breaker?

Northern Tool has 2 different 5HP P.W. One says it must be hardwired the other has a plug. 6-30P?

https://m.northerntool.com/shop/tools/product_200324563_200324563

https://m.northerntool.com/shop/tools/product_200347872_200347872

I thought the "corrent" way of wiring 5HP motors is to hardwire them per reading posts. I've been using an extension chord plugged into my NEMA 6-50R that I use for my welder.

 

[Bert_]

I have never hard wired one. They come with wheels so is meant to be portable. I'll probably get hassled for it but I'd run it on a 50A plug without a second thought.

 

[The Cobbler]

watch out, the electrical police will be here

 

[strutaeng]

I have never hard wired one. They come with wheels so is meant to be portable. I'll probably get hassled for it but I'd run it on a 50A plug without a second thought.

Um...I could live with that...but how would you switch on/off? Just use a true 5HP 2 pole switch?

I've got a redneck setup of this (1 Ph), but no wheels. I see this has a mag. starter:

https://www.pressurewashersdirect.com/Pressure-Pro-EB4030E3A402-Pressure-Washer/p65127.html

 

[Bert_]

Manual motor starter would be the nicest. If the motor has a reset on the side you could get by with a 5hp rated switch or disconnect.

 

[wyliesdiesels]

If you want to be code compliant, then none of the nema-plugs will work because theyre not rated for 5HP.

If you dont care about compliance, then dont use the plug asa disconnect especially while running.

A manual motor starter like this would work:

https://www.amazon.com/dp/B002MPQ51O/?tag=atomicindus08-20

 

[mm08822]

The motor does not have internal overload protection. You must provide it either via motor starter or a manual starter (switch) that includes provisions for overload.

 

[Bert_]

The motor does not have internal overload protection. You must provide it either via motor starter or a manual starter (switch) that includes provisions for overload.

Judging by the part number the above is correct. None of the motor rated switches linked in this thread so far have this capability. If you get a manual motor starter be sure it has overload protection. A very simple form of overload protection could also be a 25A time delay fuse (125% of FLA for motors with 1.15 service factor).

 

[mm08822]

While time delay fuses will provide the protection, aside from needing fuseblock, fuses and enclosure, spare fuses are required on hand.

A motor starter and manual starter has resettable overload hardware and does not require spares onhand.

For the manual starter solution path, hardware as below (or the equivalent thereof) can be used:

https://www.industrialcontroldirect.com/manual-motor-starter-3789.html

https://www.industrialcontroldirect.com/manual-motor-starter-3790.html