What Is SER and SEU Cable/Wire?

There are two popular variations of service entrance cable that we carry at Nassau Electrical – SER and SEU. SE service entrance cable has various uses, but can most often be found being used to convey power from the service drop to the meter base and from the meter base to the distribution panelboard. Beyond this, SER and SEU cable can be used in all applications where SE cable is permitted. If a temperature does not exceed 90 degrees C, SER can be used in dry or wet locations. The voltage rating of SER and SEU cable is 600 volts.

What Do SER and SEU Mean?

SER stands for Service Entrance cable that has Reinforcement tape. SEU is an abbreviation for Service Entrance cable, Underground.

Cable Construction

SER and SEU cable types are constructed with sunlight resistant Type XHHW-2 conductors or Type THHN/THWN conductors. The main difference between SER cable and SEU cable is that SER cable has reinforcement tape while SEU has an overall concentrically applied neutral and reinforcement tape. Both SER and SEU cable types are jacketed with gray, sunlight-resistant polyvinyl chloride.

SER and SEU Cable We Carry

View some of our SER and SEU products by clicking any of the links below. Nassau Electrical carries a wide selection of SER and SEU cable to meet your specifications.

Aluminum SER Cable

This cable also finds its primary application in panel feeders for dwellings that have multiple units as well as in branch circuits. In wet areas, its operating temperature upper limit is 90°C. The aluminum SER cable has conductors that are corded together using an uncovered aluminum alloy.

Aluminum SEU Cable

The primary application of the aluminum SEU cable is as a panel feeder for dwellings that have multiple units and also in branch circuits. Its conductors are made up of compact strands cabled together using an aluminum alloy. They are then reinforced using a circular binder tape cover. The cable’s jacket is made of polyvinyl chloride that is resistant to gray sunlight. The jacket is also flame retardant and lead-free. The wire’s insulation is designed using cross-linked polyethylene (XLPE) that is color coded.

Copper SER Cable

It is made up of 3 conductors that are stranded and insulated using cross-linked polyethylene. The insulation is resistant to both water and heat. The cord is cabled together using uncovered copper ground conductors. It has a core that is covered with binder tape that is fire retardant. Its PVC jacket has a gray color code. Just like the copper SEU cable, the copper SER cable has a cross-linked polyethylene type XHHW-2.

Copper SEU Cable:

It is made up of two conductors that are stranded and insulated using cross-linked polyethylene. The insulation is both water and heat resistant. The wire is cabled together using served uncovered copper conductors. Its core is covered with binder tape that is flame retardant and it has a gray polyvinyl chloride (PVC) jacket. Its cross-linked polyethylene is a type XHHW-2.

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