Rewiring DB for Inverter - what to do for music room?

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Spent the afternoon yesterday mapping my DB so I can switch most lights and plug points to a single phase fed via a 5kva inverter wired to 8x260ah deep cycle gel battery bank (yes, I have no faith load shedding times won't be extended).  As I'm going to rewire the DB in its entirety I'm going to use the opportunity to put the music room's plug points on a single dedicated circuit breaker (it's wired in ring fashion so no opportunity for multiple circuit breakers).

My fridges will be on the inverter phase.

Guessing it's best to keep hifi powered on a separate phase to lights and fridges?
30A breaker should more than suffice for music room power plugs?

 

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