Wen 3620, Instruction Manual

1. EXAMINE EXTENSION CORD BEFORE USE. Make sure your extension cord is properly wired and in 

good condition. Always replace a damaged extension cord or have it repaired by a qualified person before 

using it.

2. DO NOT ABUSE EXTENSION CORD. Do not pull on cord to disconnect from receptacle; always discon-

nect by pulling on plug. Disconnect the extension cord from the receptacle before disconnecting the prod-

uct from the extension cord. Protect your extension cords from sharp objects, excessive heat and damp/

wet areas.

3. USE A SEPARATE ELECTRICAL CIRCUIT FOR YOUR TOOL. This circuit must not be less than a 

12-gauge wire and should be protected with a 15A time-delayed fuse. Before connecting the motor to the 

power line, make sure the switch is in the OFF position and the electric current is rated the same as the 

current stamped on the motor nameplate. Running at a lower voltage will damage the motor.

When using an extension cord, be sure to use one heavy enough to carry the current your product will 

draw. An undersized cord will cause a drop in line voltage resulting in loss of power and overheating. The 

table below shows the correct size to be used according to cord length and ampere rating. When in doubt, 

use a heavier cord. The smaller the gauge number, the heavier the cord. 

AMPERAGE

REQUIRED GAUGE FOR EXTENSION CORDS

25 ft.

50 ft.

100 ft.

150 ft.

5A

18 gauge

16 gauge

16 gauge

14 gauge

GUIDELINES AND RECOMMENDATIONS FOR EXTENSION CORDS

ELECTRICAL INFORMATION

insulation. 

IMPORTANT:

Servicing a double-insulated product requires extreme care and knowledge of the system, 

and should be done only by qualified service personnel using identical replacement parts. Always use origi-

nal factory replacement parts when servicing. 

1. POLARIZED PLUGS. To reduce the risk of electric shock, this equipment has a polarized plug (one blade 

is wider than the other). This plug will fit in a polarized outlet only one way. If the plug does not fit fully in 

the outlet, reverse the plug. If it still does not fit, contact a qualified electrician to install a proper outlet. Do 

not modify the machine plug or the extension cord in any way. 

2. GROUND FAULT CIRCUIT INTERRUPTER PROTECTION (GFCI) should be provided on the circuit or outlet 

used for this power tool to reduce the risk of electric shock.

3. SERVICE AND REPAIR. To avoid danger, electrical appliances must only be repaired by qualified service 

technician using original replacement parts.

DOUBLE-INSULATED TOOLS

The tool’s electrical system is double insulated where two systems of insulation are provided. 

This eliminates the need for the usual three-wire grounded power cord. Double insulated tools 

do not need to be grounded, nor should a means for grounding be added to the product. All 

exposed metal parts are isolated from the internal metal motor components with protecting 

9