ron2
Posted : 9/25/2008 6:06:13 AM
Multi-tapping (what your landlord is doing) decreases the amount of current available to each tap every time he does that. Essentially, he is creating parallel circuits. Voltage is the same, total power is the same, but current is different in each branch. Distance of wire makes a difference, too. Let's say his original service was for 200 amps. A tap goes to his house. A tap goes to your house, which is farther away. His circuit presents less resistance because of less wire length. Yours has to carry all that way because of longer wire. You get losses (I^2R).
Let's say that your stove/oven is an average 8.5kW. I don't know about Canada's feed but let's pretend it's the same as our residential feed, 240 V 1 phase, two hots, neutral, and ground. The 8.5 kW oven/stove will require smidge over 35 amps. So, It should be at least on a two pole 40 breaker or fuse. I take it you have an old load center that uses screw-in fuses.
Anyway, the oven is trying to produce 8.5 kW, whether it's receiving a full 35 amps or not. First off, you might check and see of the fuses that feed your oven are big enough to handle the load. The oven should have a nameplate somewhere, probably on the back, that tells you the voltage and FLA (full load amperage).
What your landlord is doing is illegal in the States. If the power company finds out, they will come out and make him pay for the extra tap, but then, they might be able to solve your problem by requiring him to upgrade the wire going to your place. This would most likely mean larger wire which could carry the calculated load of your residence, much easier.
Fuses blow in order to protect equipment and wire. Wire can get too hot trying to carry a demand greater than it's capacity.
I'll have to answer more, later.