Dishwasher Breaker Size

[Electricalhelp]

If I have a dishwasher that is 480V, 3 Phase and it drawings 27 AMPS.

What will be the breaker size, should I go with 27*1.25 = 33.75 Amps.

Should I go with 30 or 40 AMP breaker.

 

[ptonsparky]

There should be a label on it someplace. I’m inclined to the 40 but look for a label and or installation instructions.

 

[Dennis Alwon]

IMO, you need 35 or a 40 amp breaker with wiring to match.

 

[Electricalhelp]

There should be a label on it someplace. I’m inclined to the 40 but look for a label and or installation instructions.

I found the spec online, but I just wanted to see if I should put in a 40 or 30 Amp breaker

 

[Dennis Alwon]

Showing a chart from online means nothing. You need the nameplate rating of the equipment. What size wire are you running? Does the equipment actually draw 27 amps.

 

[480sparky]

There should be a listing of the max breaker size and min conductor size.

 

[infinity]

If I have a dishwasher that is 480V, 3 Phase and it drawings 27 AMPS.

What will be the breaker size, should I go with 27*1.25 = 33.75 Amps.

Should I go with 30 or 40 AMP breaker.

Why add the 25%? The load is 27 amps non-continuous so 30 amp circuit.

 

[Electricalhelp]

Why add the 25%? The load is 27 amps non-continuous so 30 amp circuit.

For circuit protection

 

[Dennis Alwon]

Why add the 25%? The load is 27 amps non-continuous so 30 amp circuit.

Don't motors and heaters need to be at 125%

 

[infinity]

Don't motors and heaters need to be at 125%

A dishwasher is an appliance so you can use the nameplate to size the branch circuit. Also it's not a continuous load so the 27 amps is what you would use to find the minimum branch circuit size.