Portable cords are also rated as heavy duty, medium duty and light duty. These designations are given based on the jacket used on the cord. All four types (SJ cable, SJO cable, SJOW cable; and SJOOW cable) are considered heavy duty, due to their thermoset rubber jackets. Portable cord with thermoplastic elastomer jackets are considered medium duty and those with thermoplastic jackets are designated as light duty.Also can tell what type of jacket the cord has by reading the letters as well. A thermoplastic elastomer jacket will have the letter "E", usually after the "S" or "SJ" depending on the service type. A thermoplastic jacket will have a"T" instead of an "E" in the same spot. The absence of an "E" or a "T" means it has a thermoset rubber jacket.

The letter meaning:

S-Service

J-Junior 300v 

O- oil resistant outer jacket

OO- oil resistant insulation and an oil resistant outer jacket

W-weather and water resistant

UL CUL MSHA listed/CSA approved for indoor or outdoor use.

Structure

Reference Standard: UL62

Rated Voltage: 600V  or 300V

Temperature: 65°C;75°C;90°C;105°C

Conductor:Copper or Tinned Copper

Insulation: EPDM/EPR

Sheath: CPE/Neoprene

Established in 1993, Hebei Huatong Wires and Cables Group Co., Ltd covers an area more than 220,000 square meters, owning more than 420 sets manufacturing equipment and more than 250 sets of testing equipment or apparatus. Our annual production capacity is 3 billionYuan.Now there are more than 800 employers in our company, among which more than 150 are technicians. With the continuous efforts from all the employers, Hebei Huatong Wires and Cables Group Co., Ltd has realized great development to become a modern enterprise and one of the comprehensive, largescale enterprises in domestic wire and cable industry. Our products are widely used in the field of electric power, coal, metallurgy, petrochemical industry, railway, national defense, construction, aviation and other national key projects. Our products have extensive influence and good reputation in both domestic and worldwide market, such as the United States, Holland, Italy, Russia, Britain, Australia, New Zealand, Ethiopia, Ghana, Algeria,Congo, Middle East and Southeast Asia and so on. 

Our laboratory center are authorized by both of ILAC (International Laboratory Accreditation Cooperation)&CNAS(China National Accreditation Service for Conformity Assessment), so the testing results in our labs can be accepted by the international countries belong to the above organizations.

(1).When can I get the price? 

We usually quote within 6 hours after we get your inquiry. If you are very urgent to get the price, please

call us or tell us in your e-mail so that we will regard your inquiry priority.

(2).How can I get a sample to check your quality?

After price confirmation, you can require for samples to check our quality. Sample is free, but the freight

charge should be paid.

(3).How long can I expect to get the sample?

After you pay the freight charge and send us confirmed files,  the samples will be ready for delivery in 1-2

days. The samples will be sent to you via express and arrive in 3~5 days. You can use your own express account orprepay us if you do not have an account.

(4).What about the lead time for mass production? 

Honestly, it depends on the order quantity and the season you place the order.The best record we keep is

delivering 10 kilometers cable within a week. Generally speaking, we suggest that you start inquiry two months before the date you would like to get the products at your country.