My matrix this year has doubled in size. Last year I ran 2 x 350w 5v power supplies, each powering 25 metres of 2812b. This year I am planning to simply add 2 more power supplies for the extra strip. Each power supply will draw less than 50% DC side. My question relates to powering from the ac side. 4 power out of 1 x household power point? I've tried to calculate it and it seems fine but I'm not trusting my judgement and hoping more knowledgeable members can assist me. New house has much fewer power point outlets to choose from. Is it safe to run 4 of them from the 1 power point? Hope my rambling makes sense.