Safety Knights

When you say extension out/power bar, are you referring to an extension cord or power strip?

Ultimately, you have to see what the system is rated for. Check the amperage, watts, etc. that these units will produce, then compare it to what you're trying to connect it to so that you know it won't overload the circuit.

However, if possible, it's best to connect everything directly yo the outlet to reduce resistance in the circuit, plus that's what they're originally designed for. Electrical equipment is not designed to have another component added to the circuit between the outlet and the component itself.

Almost all appliances like microwaves are going to have manufacturers instructions that say they must be plugged directly into the wall outlet.

In the US, the National Electric Code does not allow extension cords to be used in lieu of permanent wiring. I'm assuming it's the same in Canada.

Were the air conditioner and microwave plugged into the wall outlets before? Is it possible that they tripped the breaker and that is why there's no current?

Everyone above is right on.

I teach my customers that extension cords are for TEMPORARY USE! I think the book meaning is generally under 90 days, which is way to long for me. Hard wiring is always safer than flexible, plus it may be a trip hazard. You cannot overload a circuit! Power Strips should only be used for low voltage equipment like computers and office equipment. I can almost guarantee that if you allow a power strip in the environment it will have radios and and fans plugged into it which will over load it.

The best thing to do is get a qualified electrician in there and fix the problems! Even 110 and 120 can easily kill, and are fire hazards!