don’t forget to consider how many watts/amps you’re drawing. it’s common to have 15 amp cabling in walls and I don’t think it’s recommended to exceed 80% capacity, especially continuous load.

I’m not an electrician, but let me try to do the math.

Amps = Watts / Volts

assuming you’re using 120v power and running the s9 at 1400W, you’d be pulling about roughly 12 amps:
11.7 = 1400 / 120

assuming a 15A circuit, your utilization is probably right at 80%:
80 % = (12 \ 15) * 100

I have some old wiring and things started smelling funny after running an aisc for a day. be careful.