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Title: Use it if you have to
Review: As a rule I don't like using these tandem devices, but if your out of space and understand the pitfalls- like overloading the neutrals on a multi-wire circuit. Then they're fine. Actually, you must have a handle-tie on multi-wire circuits now, so that would be two violations if you used this on a multi-wire circuit. If anything I've said is unfamiliar, call an electrician.
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