11-3. Grounding When Supplying Building Systems

 

 

1

Equipment Grounding

1

2

 

Terminal

2

Grounding Cable

GND/PE

 

 

Use #10 AWG or larger insulated

 

 

 

 

copper wire.

 

 

3

Ground Device

 

 

Y Ground generator to system

 

 

 

earth ground if supplying

 

 

 

power to a premises (home,

 

 

 

shop, farm) wiring system.

Use ground device as stated in electrical codes.

23

ST-800 576-B

11-4. How Much Power Does Equipment Require?

3

2

1

3

VOLTS 115 AMPS 4.5

Hz 60

1 Resistive Load

A light bulb is a resistive load and requires a constant amount of power.

2 Non-Resistive Load

Equipment with a motor is a non-re- sistive load and requires approxi- mately six times more power while starting the motor than when running (see Section 11-8).

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 amperes at 115 volts, calculate its running 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 Example 1, add the individual loads to calculate total load.

(200 W + 200 W + 200 W) + 520 W = 1120 W

The total load applied by the three flood lamps and drill is 1120 watts.

S-0623

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Miller Electric 6000 manual Grounding When Supplying Building Systems, How Much Power Does Equipment Require?