Double pole switch

[drcampbell]

... this rule is more there for untrained people then any other reason.:blink: ...

It's entirely foreseeable that an untrained homeowner might replace a 240-volt air-conditioner receptacle; should we not implement simple rules to protect him from electrocution? The NEC exists to protect the life & property of everybody -- trained & untrained alike.

Tell me you've never encountered a MWBC fed from two independent breakers?

 

[jumper]

It's entirely foreseeable that an untrained homeowner might replace a 240-volt air-conditioner receptacle; should we not implement simple rules to protect him from electrocution? The NEC exists to protect the life & property of everybody -- trained & untrained alike.

Tell me you've never encountered a MWBC fed from two independent breakers?

Reread 90.1

90.1 Purpose.
(A) Practical Safeguarding. The purpose of this Code is
the practical safeguarding of persons and property from
hazards arising from the use of electricity. This Code is not
intended as a design specification or an instruction manual
for untrained persons.

 

[PetrosA]

What makes a single circuit, a DPST switch fed from a double pole breaker, or the loads it feeds completing the circuit between the two legs instead of to a neutral?

 

[ActionDave]

...Tell me you've never encountered a MWBC fed from two independent breakers?

Before 2008 that's the way we all wired them. I still would if it were not for that foul code change.

 

[jumper]

What makes a single circuit, a DPST switch fed from a double pole breaker, or the loads it feeds completing the circuit between the two legs instead of to a neutral?

Shared noodle is a MWBC. Can be considered as two at times, but is really one.

Separate noodles are two circuits.

 

[GoldDigger]

And if there is no noodle it is definitely one circuit.

 

[jumper]

And if there is no noodle it is definitely one circuit.

Dats what da teacher told us in our schoolin'.

 

[MAC702]

Dats what da teacher told us in our schoolin'.

We were 'sposed to get schoolin' for this crap?

 

[jumper]

We were 'sposed to get schoolin' for this crap?

Not really, but don't tell the new fellas.

 

[kwired]

It's entirely foreseeable that an untrained homeowner might replace a 240-volt air-conditioner receptacle; should we not implement simple rules to protect him from electrocution? The NEC exists to protect the life & property of everybody -- trained & untrained alike.

Tell me you've never encountered a MWBC fed from two independent breakers?

What Jumper said on the trained/untrained.

MWBC from independent breakers - as mentioned it was allowed - and I installed them that way all the time before the rule change.

Didn't even have breakers adjacent to one another sometimes.