generator&transfer switch ratings

[coy3]

IS IT A VIOLATION to have a transfer switch with a greater rating than your generator.

 

[iwire]

IS IT A VIOLATION to have a transfer switch with a greater rating than your generator.

No .............

 

[augie47]

rating

rating

50% of the ones I see are such. The T/S being sized for the utility power circuit normally being used and the geneator having a lesser output. On occasion, a 200 amp T/S on a 200 amp circuit with a 30 or 40 amp circuit to the generator side.

 

[Bea]

For 702 no
For 700 and 701 the generator to be sized to carry the required loads to be served

 

[ramdiesel3500]

I am currently working on a design where a 1000kw generator will feed two 120/208V transfer switches. One switch is a 2500A. The other is a 2000A. This would equate to 1620kw at full rated load. Actual calculated load is well below 1000kw, so we are okay! Larger switches were purchased now in anticipation of future building expansion. Larger generator was too much $$$. If building expansion happens, larger generator will be a part of the building expansion cost. Remaining electrical infrastructure will (hopefully) be adequate for the future expansion making the electrical install much easier.

 

[tom baker]

What type of generator application is this 700, 701 or 702?
If you are installing a generator this is the first thing you need to know. The type of system required is often determined by legal requirements.

 

[benaround]

Coy3,

The violation would be if you had a T/S with a smaller rating!