Temp generator cable

[Electromatic]

I'm looking to temporarily hook-up a trailer-mounted 3-phase generator to an equipment shed with an existing ATS. The genset is selectable voltage, 25kVA, breakered at 60A. It would be slick if I could get cable that would have the power conductors and 2 control conductors for the ATS-automatic start. I know they make that kind of thing for 1-phase residential setups but haven't seen anything for 3-phase setups. Does anyone know of such a thing?
Otherwise, I'm thinking of using some 6/5 Type W cable and a separate piece of ~14/2 SO or SJ for the starting. I've seen some discussions about using Type G cable for this kind of thing, but I don't see the advantage. Thoughts?
Also, would the neutral be a CCC in this scenario? I don't think so but could be corrected. Maybe I could use #8 (57A)?

 

[Birken Vogt]

Since trailer mounted generators have a neutral-ground bond, I "might" have done this sort of thing with Generac cable taping the green white and taping the white blue. But I plead the 5th

 

[hillbilly1]

If this is a rental, it may be cheaper to just rent the individual cables from the rental place, and just run two thhn’s for the remote start.

 

[zbang]

Since trailer mounted generators have a neutral-ground bond,

Often they don't, always check and bond as appropriate.

 

[Birken Vogt]

Often they don't

Show me.

 

[tom baker]

The trailer generators I rented had no neutral bond. These were 25 kw and larger.

 

[Birken Vogt]

I mean, somebody could have removed it, but they come with a wire jumper between N and G. I work elbows deep in them and I see it with my eyes.

 

[zbang]

Show me.

I can't show you something that isn't there, but virtually every trailer-mounted generator (maybe 50-250kva) I've touched did not have an N/G bond; I had to add it when needed.

The point is: don't assume, check.

 

[Electromatic]

The genset has a removable N-G bond. The ATS is 3-pole (solid neutral).

Am I reading Table 400.5(A)(2) correctly for Type W cable:

75° Column F (3- or other multiconductor cables with only 3 CCC)
8AWG --> 57A

 

[Birken Vogt]

As to the cable size, the generator is likely rated at 60.1 amps, with a 60.0 amp breaker that would lead you to 6AWG but if your load is under 57 amps then next-size-up would lead you to 8AWG

As to the G vs W, in the larger sizes type G is usually substantially cheaper but I just looked and a #8 the type W is cheaper plus you don't have to mess with all the individual ground wires.

As to the N-G bond, yes the proper way would be to remove it and ground the generator back to the main bond like any permanent non SDS generator.

Then use whatever cable makes sense for the 2-wire start.

 

[hillbilly1]

I can't show you something that isn't there, but virtually every trailer-mounted generator (maybe 50-250kva) I've touched did not have an N/G bond; I had to add it when needed.

The point is: don't assume, check.

Don’t assume they sent you the right voltage either! I was hooking up a car auction house after a hurricane in Louisiana, they sent one set up for 480 auction place was 208. Changed the taps. Another job the customer sent out the wrong generator, our guys didn’t check it, and just turned it on. Fried the EMS, refrigeration and a lot of other stuff shooting 480 to a 2000 amp 208 volt service.