13-3. Grounding When Supplying Building Systems
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| 1 | Equipment Grounding | |
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| 2 | Grounding Cable |
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| GND/PE |
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| Use #10 AWG or larger insulated | |||
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| copper wire. |
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| 3 | Ground Device |
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| . Use ground device as stated in | ||
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| electrical codes. |
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| Ground generator to system | |
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| earth ground if | supplying |
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| power to a premises (home, | |
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| shop, farm) wiring system. | |
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| Also see AWS Safety & | |
2 | 3 |
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| Health Fact Sheet No. 29, | |
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| Grounding of Portable And | |||
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| Vehicle Mounted | Welding |
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| Generators. |
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13-4. How Much Power Does Equipment Require?
1 Resistive Load
3
2
1
3
VOLTS 115 AMPS 4.5
Hz 60
A light bulb is a resistive load and requires a constant amount of power.
2
Equipment with a motor is a
3 Rating Data
Rating shows volts and amperes, or watts required to run equipment.
Amperes x Volts = Watts
Example 1: If a drill uses 4.5 am- peres at 115 volts, calculate its run- ning power requirement in watts.
4.5 A x 115 V = 520 W
The load applied by the drill is 520 watts.
Example 2: If three 200 watt flood lamps are used with the drill from Ex- ample 1, add the individual loads to calculate total load.
(3 x 200W) + 520 W = 1120 W
The total load applied by the three flood lamps and drill is 1120 watts.