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Threes Way Electricity can cause a fire?
1. Stripping if not done correctly cause pinch in wire .. Area where pich is cause overheating
2. kinking- stretches wire making it smaller
3. When using Aluminum, problems using appliances that draws a lot of current. There is an electro-chemical reaction between the aluminum and the backplate
The Canadian electrical code classifies hazardous locations in three classes- what are they and define?
Class I
Flammable gas or vapours are present in the air which may burn or explode
Class II
-is hazardous because of presence of combustible or electrically conductive dust
Class III
- is hazardous because of presence of easily ignitable fibers or flyings
List three warning signs that there may be a problem with copper or aluminum wiring?
- wall outlets don't work, become overheated , discoloured or give off burnt odour
- fuses blow or circuit breakers that trip often
- unusually warm switch or faceplates
Describe characteristics of "Original Fuse"
- up to 15 amps
- one fuse per circuit
- wire is enclosed in a ceramic or glass body
- if overloaded it will get hot enough and melt
Describe the characteristics of "Original Fuse"
Describe Type P fuses
- fuses with 15 amps should be replaced with Type P fuses
- major cause of fuse blowing is when there is a motor in the circuit
- Type P fuses will detect overheating unlike original fuses
- when a motor starts running it draws up to 6 times the nameplate current
What is OHM'S LAW?
Current = volts
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Resistance (ohms)
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