Porter-Cable PXCMV5048055 Use and Care Manual download pdf (Page 11)

11 - ENG

ELECTRICAL POWER REQUIREMENTS

I WARNING

Risk of electrical shock. Improper electrical grounding

can result in electrical shock. The wiring should be done by a qualified

electrician.

ELECTRICAL WIRING

Refer to the air compressor’s serial label for the unit’s voltage and amperage

requirements. Ensure that all wiring is done by a licensed electrician, in

accordance with the National Electrical Code.

MAIN POWER PANEL

For best performance and reliable starting, the air compressor must be installed

on a dedicated circuit, as close as possible to the electrical power panel.

Provide circuit breaker or fuse protection at your main power panel. Use time

delay fuses on the circuit, because the compressor will momentarily draw

several times its specified amperage when first started.

NOTE: A circuit breaker is recommended. If the air compressor is connected to

a circuit protected by a fuse, use dual element time delay fuses (Buss Fusetron

type “T” only).

MAIN POWER DISCONNECT SWITCH

Install a main power disconnect switch in the line from the panel to the

compressor. The main power disconnect switch must be located near the

compressor, for ease of use and safety. When turned OFF, the main power

disconnect switch shuts off all power to the compressor. When it is turned ON,

the compressor will start and stop automatically, controlled by the pressure

switch.

LOW VOLTAGE PROBLEMS

Low voltage will cause difficult starting or an overload. Low voltage can be caused by

a low supply voltage from the local power company, other equipment running on the

same line, or inadequate wiring. If any other electrical devices are drawing from the

compressor’s circuit, it may fail to start.

Low voltage to the compressor can be caused by a supply wire of insufficient gauge for

the distance between the compressor and the power source. The longer the distance,

the larger the wire gauge (lower the number) must be, to overcome the inherent voltage

loss caused by the wire resistance. Refer to the National Electrical Code to determine

proper wire size for your circuit.

If the wiring is not adequate, the input voltage will drop by 20 to 40 volts at startup. Low

voltage or an overloaded circuit can result in sluggish starting that causes the circuit

breaker to trip, especially in cold conditions.

GROUNDING INSTRUCTIONS

This product must be connected to a grounded, metallic, permanent wiring

system, or an equipment - grounding terminal or lead on the product.

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Porter-Cable PXCMV5048055 Use and Care Manual Page 11