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3. grounding when supplying building systems, 4. how much power does equipment require – Miller Electric Big Blue 402D User Manual

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14-3. Grounding When Supplying Building Systems

ST-800 576-B

1

Equipment Grounding

Terminal

2

Grounding Cable

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.

GND/PE

1

2

Use ground device as stated
in electrical codes.

2

3

14-4. How Much Power Does Equipment Require?

S-0623

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 14-8).
3

Rating Data

Rating shows volts and amperes, or

watts required to run equipment.

VOLTS 115

4.5

60

AMPS

Hz

1

2

3

3

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.

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

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

AMPERES x VOLTS = WATTS

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