Hooking up a big pressure washer and need some advice...

[AylmerQc]

I normally do maintenance so I don't get too much hands on experience ordering material.
Located in Nunavut, in a small remote hamlet so I don't have access to an electrical wholesaler and everything needs to be figured out on what is needed then ordered then shipped or flown in.
The pressure washer draws 85 amps 208 V 3phase (from the specs label).

The pressure washer is located in a garage between bays and will be used to clean trucks and heavy equipment.
The manual advises that it be on a GFCI, or a twist-lock connection or hardwired.

Hardwired isn't really a good option since I'd need to run the Teck cable overhead and down to the pressure washer.
I've chosen to use SOOW with Hubble pin and sleeve connector/socket so that the cable can be rolled up when the machine isn't in use.
I've planned on a 100 amp 3P breaker and 60 feet of Teck cable to a 100 amp disconnect with an attached pin-sleeve 100 amp receptacle.
On site we have 3C #3 AWG Teck cable. Wo don't have the SOOW cable although in our system inventory database it list 4C #2 AWG SOOW.
My questions are:
can I use #3 Teck cable up to the disconnect then # 2 for the cab tire or do I need to stick to all one size AWG?
Does the disconnect need to be fused?

Thanks in advance...

 

[garbo]

Had to Google where Nunavut is located. Article Ocean is the northern boundary & only accessible by air or sea. No roads connecting to southern Canada. From the warm states and would suggest that you ask the what we call the AHJ ( Authority having Jurisdiction ) and ask them. Our hard working inspectors would rather answer a few questions rather then go to a location to fail a job. Usually if the circuit is protected by a circuit breaker you would not need fuses. Some air conditioner equipment in the states want you to have fuses. Hope you are sitting down when you are receive the price for a 100 amp three phase GFCI protection. Work safe & keep warm.

 

[winnie]

On your first question, you do not need to stick with a single conductor size for the entire circuit. What is required is that each part of the circuit be rated for the load and be properly protected by the breaker or fuse.

You may want to double check the size of your SOOW. I think #2 SOOW with 3 current carrying conductors is only rated for 80A. Your installation may require #3 Teck then #1 SOOW. Also double check conductor counting in the Teck; is does 3C mean 3 circuit conductors + EGC or do they include the EGC (most building wire doesn't count the EGC, most flexible cord does count the EGC, so it always pays to double check).

-Jonathan