Commercial Dishwasher

[MTW]

50A is required, per Post #49

See it whatever way you like, I did one of these two years back, with the built in rinse booster heater. The manual said 48 amp draw @ 208V 3Φ. 50 amp draw @ 240V 3Φ.

The factory approved supplier/ installer said that it needed a 60 amp breaker and wires for the wiring not to burn up on the onboard rinse booster heater elements, that are a pain to get to.

I ran the circuit in EMT conduit, and let him terminate the machine connections, since he would be providing any support it required.

In a busy kitchen, I doubt that a 48 or 50 amp load would survive too long without trouble on a 50 amp circuit, when it could be running non stop during the busy times, especially when connected to heating elements. It's been running without a hiccup since the install in a busy restaurant. On a wild leg 240 delta.

The optional model required two circuits, to split the heating load from the machine loads.

DH6000 VHR Ventless Heat Recovery Door Machine Hood-Type

www.championindustries.com

 

[Malywr]

Whats wrong with 3PH GFCI breaker I posted in #53 ?

This would be great i need to contact suply house and show them this pdf

Thank you


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[ramsy]

DH6000 VHR Ventless Heat Recovery Door Machine Hood-Type

www.championindustries.com

Yes, Max OCP = 60A, per 110.3(B) listed instruction

3-Pole 60A GFCI's , source 2, or source 3, are considered available per 90.4 (last paragraph)

The language in 422.5(A)(7) makes exception for Appliance rated > 150v to ground, not Supply rated line voltage

Post #9 nameplate shows model DH6000 operating at "208-240v/60Hz/3-phase" line voltage, not 240v to Gnd, not > 150v to Gnd

 

[ramsy]

if it is supplied by three pole breaker from a delta system (with more than 150 volts to ground on any conductor) GFCI is not required

For 2020 NEC, supply voltage applies to 210.8 Receptacles or (D) Outlets, not hard-wired Appliance rating per 422.5

The language in 422.5 makes exception for Appliance ratings > 150v to Gnd , not Supply rating

 

[infinity]

For 2020 NEC, supply voltage applies to 210.8 Receptacles or (D) Outlets, not hard-wired Appliance rating per 422.5

The language in 422.5 makes exception for Appliance ratings > 150v to Gnd , not Supply rating

Isn't a hard wired appliance connected to an outlet?

 

[ramsy]

Isn't a hard wired appliance connected to an outlet?

Look at highlighted text in post 64:

Receptacles or (D) Outlets vs Appliance rating

Appliance ratings vs Supply rating

Cord & Plug is also connected to receptacles, but such GFCI requirement is governed by supply rating