Do these 1500W heaters run at 1500W constantly? If so, this only gives me 2.5 AMP's left to run my TV and any other equipment. If these things are variable and I may be ok.
I believe that these heaters have two "speeds", on and off. In my experience, there's nothing variable about them, except that some of them have a switch that varies the heat output, like a "High" and a "Low" setting, but I get the idea that's not the nature of your question. I suppose there might be a slightly higher amperage draw as the heating elements are ramping up, then a bit of reduction as the device is asked to deliver constant heat rather than increasing heat, but if so it's not much, in my experience.
I own an old house in which I have been using these sort of small electric heaters. I have noticed that when the heater is on, it takes very little electrical usage to trip the 20 amp circuit breaker. This gets annoying, it's not possible to leave the TV on in the living room and heat some water in the microwave without tripping that breaker (yeah, I'd really like the chance to talk to the guy who put both
the kitchen and
the living room on a single, 20 amp circuit!! :furious: ).
I'm hoping to be able to run a second circuit to my basement and "separate" the original circuit into two separate zones, leaving the first of the two zones as original and hooking the new circuit to the second zone where I separated the wiring.
It was so infuriating to me that I wanted to (and actually did!) run 10 gauge wiring on 120v/30 amp breakers into the basement, hoping to place at least some of the heavier drawing equipment, such as the TV/audio gear, on it's own separate circuit with plenty of reserve. Turned out to be a foolish idea, found that out when I asked for advice and found out the only 30 amp 120 volt receptacles are the twist-loc type and of course none of the equipment has those types of plugs.
Bottom line is that it's best to run another circuit, I guess.....although I do think you'd be OK "borrowing" amperage from that other circuit in your basement as long as you used a beefy enough extension chord. I've done that in this old house, it worked better than tripping the breaker every time I turned on the kitchen light.