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7 Cards in this Set
- Front
- Back
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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 |
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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
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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
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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
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Describe the 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
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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 |
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What is OHM'S LAW? |
Current = volts ----------- Resistance (ohms) |
