Master Lock MGR2900A, MGR4500I, MGR6000I installation manual Extension Cords, Generator Grounding

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PORTABLE GASOLINE GENERATORS

EXTENSION

CORDS

Only use grounded extension cords. Be sure to use extension cord with proper wire gauge size. See chart below.

Recommended Minimum Wire Gauges (AWG) for Extension Cords

Ampere	AWG for Length of
Load		Cord in Feet
	50'	100'	150'
2	18	18	18
3	18	18	18
4	16	16	16
5	16	16	16
6	16	16	14
8	16	14	12
10	16	14	12
12	14	14	12
14	14	12	10
16	12	12	10
20	10	10	8
GENERATOR
GROUNDING

WARNING: You must prop- erly earth-ground generator be- fore starting. This will help guard againstdeadlyelectricshock.Only use grounded plugs with genera-

5.Drive grounding point into ground. Note: Grounding point can be a stake, grounding rod, or pipe. Grounding point should be copper or brass.

6.Attach ground wire to grounding point.

Youmustsupplythegroundwireandground- ing point. These do not come with generator. Follow the National Electrical Code and all state and local codes. Consult your power company or a licensed electrician.

WARNING: For a grounding point, do not use metal pipe be- ing used to carry combustible materials or gases.

Flat Washer

SEMS Nut

Ground Bolt

Spade

Connector

H

Detail A

E	FUEL
	F

STANDBY INSTALLATION TO HOME OR BUILDING

WARNING: Have standby in- stallation performed by a skilled, licensed electrician. Do not let anyone else wire into a utility circuit. Personal injury, equip- ment damage, or damage to home could occur.

IMPORTANT: This generator will not power your entire home. Most home utility electric service is more than 60 amps. This will exceed generator output. Only power needed items during a power outage. Make sure total wattage of electrical load does not exceed rated wattage of generator.

You may need to use this generator as a standby power source. During a power out- age, the generator will power selected items in a building. Have generator and additional wiring installed by a skilled, licensed electri- cian. This is not a do-it-yourself job. Follow all local codes.

WARNING: The electrician must install a double-throw transfer switch. This isolates ex- isting electrical circuits from the utility power line. If not isolated, generator output will back-feed into utility power line. This may

tor. Only use grounded extension cords. Only use three-wire or double-insulated power tools.

Grounding generator helps prevent electric shock from a ground fault condition. Follow these steps to ground your generator:

1. Locate ground bolt on generator hous-

ing (see Figure 7).

Ground

Wire

Copper or Brass	Alternator
Grounding Point

	120V
120VI
GFC
TER	AGE	120
R ME	LT	+
HOU	VO	240
120	CTOR
ONLY	SELE
LE
O-ID
AUT
ON		SET
OFF	RE
RES	ET
ET
RES

electrocute a power company line repair person.

2.	Loosen SEM nut on ground bolt. Note:
	Do not remove SEM nut from bolt.
3.	Attach a spade connector to the end of
	a #10-8 stranded-copper ground wire.
4.	Attach spade connector to ground bolt
	between flat washer and SEM nut (see
	Detail A in Figure 7).

Figure 7 - Grounding Generator (Model MGR4500I Shown)

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