i have two 10" l7's and a kicker zx1200.1 and they beat. the rms on thus subs are only 600 so the kicker zx500.1 or the zx750.1 would be plenty for what u got.
AWG 10 guage.
7.2kW shower = 32 Amp fuse = 6 mm2 cable size7.5kW shower = 40 Amp fuse = 10 mm2 cable size8.5kW shower = 40 Amp fuse = 10 mm2 cable size9.5kW shower = 40/45 Amp fuse = 10 mm2 cable size10.5kW shower = 45 Amp fuse = 16mm2 cable size
5 amp,10 amp, 15 amp, 20 amp, 25 amp, and 30 amp.
You could go with a 600 watt 2 ch amp or a 300 watt mono block amp, depends on what OHM the subs are, if they are 8 ohm you could wire them down to 4 ohm or if they 4 ohm u could wire them to 2 ohm, i have a 600.1 Boss amp and subs are wired together at 2 ohm and they BANG.
On a 30 amp circuit, you would use a #10 copper ground. The ground never has to be larger than the ungrounded conductors.
50 mm or 2 inch will handle the 3/0 wires for a 200 amp service.
It is unusual to have multiple outlets on a 30 Amp service. If you do this you need outlets rated at 30 amps and 10 AWG wire.
10 amps is the maximum it will carry.
AWG # 10
30 amp breaker with #10 gauge copper wire
10 inch diameter
Minimum size is 10 gauge with a 30 amp breaker. To be safe I would install an 8 gauge with a 40 amp breaker.