Servicing of Grounded Products, Explanation

Important Safety Information

Servicing of Grounded Products

The standard accepted color coding for grounding wires is GREEN or GREEN WITH YELLOW STRIPE. These ground leads are NOT to be used as current carrying conductors. It is extremely important that the technician replace any and all grounds prior to completion of the service call. Under no condition should ground wire be left off causing a potential hazard to technicians and consumer.

Explanation

Polarization–This means that the larger slot must be neutral and the small slot must be hot (live). Mispolarized–The outlet is miswired so that the larger slot is hot (live) and the smaller slot is neutral. Grounded–This means the round hole connection is connected to earth ground through a connection to the main power panel.

Ungrounded–The round hole connection is not complete to earth ground and/or the main power panel.

Wiring

A good service practice is never route wiring over terminals and/ or sharp edges. This applies to any wiring without regard to the circuit voltage. Wire installation material and thickness is designed and regulated for electrical spacing purpose only, but cannot always be relied upon because of possible cuts and/or abrasions, which can occur during servicing.

Test Procedures (2 Methods)

Method #1

Use a ground monitor plug available for purchased at local hardware store. The lamps inside the monitor indicate a correctly or incorrectly wired outlet by instructions imprinted on the monitor body.

!WARNING

To avoid risk of electrical shock, personal injury or death; verify the oven is properly grounded and polarized.

Proper Grounding and Polarization of 120 Volts Wall Outlets

For the safety of our customers and the service technician ALL appliances have a three–prong power cord and MUST be connected to a properly polarized and grounded wall outlet.

This information was written for those who do not understand grounding and polarization of a wall outlet.

A 120 volt wall outlet must always be wired as shown below.

Method #2

Voltmeter - (Use scale over 125 Volts A.C.)

•Test A - "H" to "N" must indicate line voltage.

•Test B - "H" to "G" must indicate line voltage.

•Test C - "N" to "G" must indicate zero (0) volts.

If "N" to "G" indicates line voltage the outlet is improperly polarized.

If "H" to "G" indicates zero (0) volts the outlet is not grounded.

Neutral (N) - This slot is the larger of the two and should be neutral (dead) with respect to ground.

N H

Hot (H) - This slot is the smaller size and should always be hot (live) with respect to neutral (N) and ground(G).

!CAUTION

To avoid risk of electrical shock, personal injury or property damage; wiring changes or grounding of wall outlet are to be made only by a qualified electrician.

Ground (G) - The round hole connection is for the grounding circuit. Behind the cover plate a green wire should be connected to this terminal.

General Test Information

Most testing in the manual is conducted with an ohmmeter using a multiplier scale of X 10k (k–thousand ohms). When using this scale, it is important that your fingers do not touch the metal parts of the test probes. To do so will give a false indication of the ohm reading.

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1800 W - 2005 specifications

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