Dual Circuit Water Heater - Disconnect Switch

[designer82]

I have a dual circuit water heater. Please see vendor's wiring diagram in link below.
I'm not sure how to do the local disconnect. 2 different disconnects (one for each circuit) or 1 disconnect that is like double pole, double throw type of deal?

Appreciate your feedback

wiring schematic — Postimages

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[designer82]

I meant double pole single throw, I believe that is the way to go.

Would like to hear your thoughts, thank you

 

[Seven-Delta-FortyOne]

If I’m understanding your wiring diagram correctly, it appears there is a 240V circuit, and a 120/240, so a 2 pole disconnect wouldn’t work.

You’ll need two disconnects grouped together and labeled.

 

[infinity]

Does anyone make a 4-pole switch?

 

[designer82]

If I’m understanding your wiring diagram correctly, it appears there is a 240V circuit, and a 120/240, so a 2 pole disconnect wouldn’t work.

You’ll need two disconnects grouped together and labeled.

That water heater requires 2 independent circuits which are 208V-2 Pole each.

 

[curt swartz]

If I’m understanding your wiring diagram correctly, it appears there is a 240V circuit, and a 120/240, so a 2 pole disconnect wouldn’t work.

You’ll need two disconnects grouped together and labeled.

One power source shows L1, L2 & EGC. The second power source just shows L1 & L2

2 disconnects can be used or a feeder can be ran to a small 4 circuit load center.

 

[designer82]

One power source shows L1, L2 & EGC. The second power source just shows L1 & L2

2 disconnects can be used or a feeder can be ran to a small 4 circuit load center.

I like the single feeder, local 4 circuit load center idea. Cost effective.
Do you know if there's a requirement for a handle tie (for the two double pole breakers) for such an application?

 

[augie47]

Handle tie is not required but 225.30 has requirements for multiple circuits to one appliance.

 

[tjdilly]

Handle tie is not required but 225.30 has requirements for multiple circuits to one appliance.

Isn't Part 2 of section 225 only regarding power feeders for buildings or other structures?

 

[augie47]

Isn't Part 2 of section 225 only regarding power feeders for buildings or other structures?

old age again... 422.30