Frequently Asked Questions...
Can I run two or three 14 ga wires in place of one 8 ga? They should handle the same load in theory, right?
I am installing a hot tub and it requires a 50 amp service. I have seen larger wires paralelled to achieve a higher amp load. Can I pair up two or three 14 ga wires instead of one 8 ga that 50 amps usually calls for? I have a ton of 14 ga laying around and I would like to use it up if it will work.
Answer:
I think you probably have the idea by now... Don't do it.
The Canadian Electrical Code only allows conductors to be run in parallel, in sizes No. 1/0 AWG and larger. One of the main reasons for this is because smaller conductors have higher resistance. The longer and/or smaller the wire, the higher the resistance. If smaller conductors are run in parallel, even slight differences in length can create imbalances in the amount of current going through each conductor. This will result in over-heating (ie: possible fire). The other reasons given so far apply as well.
You need to have a permit for this work. You can probably get a homeowner's permit but if you're not sure how to do it right, hire a licensed electrician. Doing electrical work is dangerous. Of all the systems in your house, this is the one that can kill you and/or burn your house down. Make sure you know how to do it right. Make sure that you do it right. The price for a permit, or for hiring a contractor is far less than the price you could pay if you have a fire or if someone gets injured or killed. (Yes, even 110 volts can kill you).
In addition, you will need to make sure that your hot tub has an approval label (such as CSA, ETL, ULC, cUL, etc.) Your local inspection authority can help you to find out if your hot tub is approved. If it's not, it isn't legal to connect it or use it and you could be at risk.
Make sure that the wire you use is sized appropriately for the load. The hot tub should have a name plate that tells you the load and wire size. Make sure that your circuit breaker (or fuse) are sized to properly protect the conductors. Make sure that your hot tub is GFCI protected.
Either keep your # 14 wire for future use, or sell it for scrap. Maybe an electrical contractor will buy it from you if it is new and in good shape (it can't hurt to ask... the worst they can do is say no).
My advice is to hire a licensed electrical contractor. The contractor has the knowledge and experience to do the job properly and will make sure that you end up with a safe electrical installation.
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14 Ga
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