Commercial dishwasher on a 32amp ring main

[JohnW2]

ooks as though it was designed as a 3phase, then modified to a single phase, giving a much higher current demand in the process. Are such commercial dishwashers usual?

I'm no expert, but I think it's common for all sorts of commercial equipment (and, come to that, a lot of domestic appliances in some parts of the world) to be configurable for single or 3-phase (and maybe 'split-phase' in some countries), and the current required will obviously be much higher when a single-phase supply is used. The clue to the truth is the rated power.

Kind Regards, John

 

[Spark123]

Yep, it isn't a higher current demand as such, just in a 3 phase environment the load is spread across the three phases and the neutral current is usually around zero (if there are single phase bits in there there'll be a bit of neutral current, likewise if the 3 element currents are imbalanced there'll be a bit more.)

 

[JohnW2]

Yep, it isn't a higher current demand as such, just in a 3 phase environment the load is spread across the three phases and the neutral current is usually around zero

Sure, but what I was talking/thinking about was the total current in the (one or three) line conductors - which is essentially what matters to the OP.

Kind Regards, John

 

[bwallum]

Thank you very much for the insightful comments. I will at least be able to better brief the electrician and hopefully save some time in getting the machine properly installed.

Best Regards
Bob