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120v vs 240v

Doing a electric panel upgrade and thinking of running 3 new dedicated 8 gauge circuits, 2 for possible future 240 v  ( which can also be 120v) monoblocks and a dedicated 20 amp for other gear
What are the pros and cons of 240v  vs 120 v for amplifiers

also how many isolated ground circuits do I need?

 Thanks 
digitaljoseph
digitaljoseph OP
12 posts
 
Clarification 
perhaps my prior post was a bit inartfully stated

i am trying to accommodate future potential needs while addressing present and future costs.  I have no issues changing out breakers and plugs in the future to accommodate a potential 240 v amp., as last ng as the wiring and ground are adequate Definitely doing a new panel as I am adding 2 Tesla supercharger circuits, summer kitchen etc
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ditusa's avatar
ditusa
1,883 posts
 
i get it go on amazon type in leviton 5842-i  plug i went down this road if you do run #3-10 awg from pannel to plug now you can run any thing from 100v to 250v consult a electrician tell what you want
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cleeds
5,944 posts
 
ditusa
CLEEDS the the plug that is needed is a leviton 5842-i i have 2 in my home in stall by a electrician 125v 20amps top bottom 250v 20amps ...
That’s fine, but the circuit you described was 30A for both the 120VAC and 240VAC lines. That Leviton receptacle definitely doesn’t meet my local code for that purpose and I don’t think it meets NEC, either.
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