ProGlo

Pro Glo extension cords are for contractors running power to tools, with a separate line for connecting a block heater. The choices are a 10/3 SJTW lighted extension cord with Continuous Ground Monitoring (CGM) and a dedicated 16/3 SJTW block-heater cord. Choose by the job and your equipment’s electrical requirements.

Pro Glo is an extension-cord brand of Century Wire & Cable. Century’s sales and manufacturing business began in 1979. The company manufactures heavy-duty extension cords for professional building contractors.

The 10/3 cord for contractor work

The Pro Glo 10/3 SJTW extension cord combines a lighted design with Continuous Ground Monitoring. Its heavier conductors have less resistance than the 16/3 cord’s conductors, helping limit voltage drop along a run. That’s a practical advantage when you’re supplying a tool under load.

Choosing by reach alone is the mistake to avoid. Extra length adds resistance and gives you more cord to route around the work. Choose the shortest run that reaches comfortably without pulling on either connection, and follow the tool’s cord requirements for that distance.

Before each use, inspect the lighted cord’s jacket, plug and connector for cuts, crushed spots, loose parts and heat damage.

A dedicated cord for the block heater

Pro Glo makes a dedicated 16/3 SJTW block-heater cord. That answers the application question directly: there’s a separate line for this job. The block-heater model is red; match the cord’s marked electrical rating to your heater’s requirements.

Flexibility when the cord gets cold

Pro Glo’s high-visibility cold-weather PVC insulation and jacket are designed for working flexibility down to -40°F. That matters when you’re laying out a cord and coiling it afterward. Let it bend naturally, coil it loosely and keep the plug and connector out from under heavy gear.

Pro Glo cord specifications

Model	Application and features	Gauge	Jacket type	Color
D17003050	Lighted extension cord with CGM	10/3	SJTW	Yellow
D17003100	Lighted extension cord with CGM	10/3	SJTW	Yellow
D17004050	Lighted extension cord with CGM	10/3	SJTW	Green
D17004100	Lighted extension cord with CGM	10/3	SJTW	Green
D19007602	Block-heater cord	16/3	SJTW	Red

Frequently Asked Questions

What are ProGlo extension cords used for?

ProGlo extension cords are used to run power to tools on contractor jobs, and the 16/3 SJTW cord is made for connecting a block heater. Match the cord’s marked electrical rating to your equipment, and follow the equipment’s cord requirements for the distance you need.

What does CGM mean on a ProGlo extension cord?

CGM stands for Continuous Ground Monitoring, and it’s included on ProGlo’s 10/3 SJTW lighted extension cords. It gives you a ground-monitoring feature alongside the lighted design, but you still need to inspect the jacket, plug and connector before each use.

Are ProGlo cords flexible in cold weather?

ProGlo’s high-visibility cold-weather PVC insulation and jacket are designed to maintain working flexibility down to -40°F. Let the cord bend naturally when you lay it out, and coil it loosely afterward instead of forcing tight bends into a cold jacket.

What’s the difference between the 10/3 and 16/3 ProGlo cords?

The ProGlo 10/3 SJTW cord is a lighted extension cord with CGM, while the 16/3 SJTW cord is a dedicated block-heater cord. The heavier 10/3 conductors have less resistance, which helps limit voltage drop, so choose by the equipment’s requirements and the length of the run.