We’ve spent years in the cable industry, and if there’s one workhorse we’ve seen on more factory floors, construction sites, and entertainment venues than almost any other, it’s the SOOW Cable. It’s the rugged, reliable, and incredibly versatile solution for when you need power exactly where the work is happening.
Why is it the go-to choice for so many professionals? And how do you ensure you’re using it safely and effectively? Here is some practical information to help you safely and efficiently select and use SOOW cables.
What is SOOW Cable?
The type SOOW cable is a heavy-duty, multi-conductor portable power cord designed for extreme durability and flexibility. The soow cable meaning is an acronym defined by industry standards like UL 62.
- S = Service cord. This means the cable is designed for demanding, portable use and is rated for up to 600 volts.
- O = Oil-resistant insulation. The insulation around each wire inside the cable can stand up to oil and grease.
- O = Oil-resistant jacket. The outer jacket—the cable’s “skin”—also resists oil, so it won’t break down in messy workspaces.
- W = Weather and water resistant. The cable is tough enough to handle rain, sunlight, and outdoor conditions.
Inside, Cable SOOW uses finely stranded copper conductors for exceptional flexibility. Each conductor is insulated with thermoset rubber, such as EPDM (a material known for staying flexible in cold and resisting chemicals). The entire assembly is protected by a tough thermoset rubber jacket, often made from CPE, which prevents brittleness in freezing temperatures and melting in high heat. SOOW cables maintain performance from -50°C to 90°C.
When you see a code like “12/3 SOOW cable,” it tells you the cable has three 12-gauge wires—often two hots and a ground for single-phase circuits. A “10/4 SOOW cable” has four 10-gauge wires and is commonly used for three-phase equipment. The first number is the wire size (AWG), and the second is the number of conductors.
What is SOOW Cable Used For?
The uses permitted for SOOW cable are extensive, spanning multiple industries.
Industrial and Construction Sites: Powers heavy machinery, portable tools, welding equipment, large motors, and temporary lighting. Its rugged build allows it to withstand being dragged over rough surfaces and exposure to chemicals and impacts. For tasks that require especially high current, such as arc welding, welding cable is often used alongside SOOW cable.
Entertainment and Live Events: Commonly used to supply power for stage lighting, sound systems, and AV equipment on concert tours and film sets. Its flexibility makes it ideal for quick setups and breakdowns.
Specialized Applications: SOOW cable is also found in marine and dockside power (resistant to salt and water), agriculture (withstands chemicals and weather), and as pendant cable for cranes and hoists, where constant flexing is required.
SOOW vs. Other Portable Cables: Which Should You Choose?
Choosing the right portable cord can be confusing due to similar-looking product types. Here’s a quick comparison:
SJOOW vs SOOW cable: The “J” in SJOOW stands for “Junior Service,” meaning it’s rated for only 300V, compared to SOOW’s 600V rating. Consequently, SJOOW has a thinner jacket, making it slightly more flexible but less durable. For example, If you need to power a large industrial fan that operates at 480 volts, SOOW cable is required due to its 600V rating. In contrast, a handheld drill for light repairs would be safely powered using SJOOW cable, which is rated for up to 300V.
SEOOW vs. SOOW: The “E” in SEOOW stands for Thermoplastic Elastomer (TPE), which is used for the jacket instead of the CPE rubber on SOOW. TPE offers superior flexibility, especially in extreme cold, and often has a wider temperature range (e.g., -50°C to 105°C). For general heavy-duty use, SOOW is the standard. For applications in freezing environments, SEOOW is the better option.
STOW vs. SOOW: The “T” in STOW indicates a Thermoplastic (PVC) jacket. PVC is less flexible, can become brittle in the cold, and may deform under high heat. It’s a lower-cost, lower-performance option suitable for consumer-grade extension cords. For any industrial or commercial application, the thermoset rubber jacket of SOOW is the necessary upgrade for safety and longevity.
SO vs SOOW cable: The original SO cord designation guaranteed an oil-resistant jacket but not necessarily oil-resistant insulation. The SOOW designation, with its double “O,” certifies that both the inner insulation and the outer jacket are oil-resistant. Today, Type SOOW cable has almost entirely superseded the older SO and SOW types, offering a higher level of protection as the new industry standard.
Type W vs SOOW cable: Unlike SOOW and SJOOW cables, Type W cable is specifically designed for temporary high-voltage applications, supporting up to 2000V. Its tough rubber outer jacket provides excellent resistance to weather and water, making it a true heavy-duty service cable. Built to withstand impacts and abrasion from harsh environments, Type W cable is the reliable choice for powering drilling rigs, locomotives, pumps, cranes, and other heavy machinery.
Safe Use and Best Practices for SOOW Cable
Some of the most frequent questions we hear revolve around these specific use cases:
Can SOOW cable be buried? No, SOOW wire is not rated for direct burial. It lacks the necessary metallic shielding or conduit protection required for permanent underground installation. However, it can be run in a conduit underground.
Can SOOW cable be used in walls? No. Cable SOOW is not permitted for use as a permanent building wire inside walls. It is designed as a portable cord for temporary power. Building wires like THHN/THWN in conduit are required for permanent installations due to their different fire-resistance ratings.
Is SOOW cable tray rated? Yes, SOOW wire is generally permitted for use in cable trays. When installing Cable SOOW in a cable tray, follow NEC Article 392, which requires cables to be laid in a single layer and secured at regular intervals to prevent tangling or overheating.
Inspection Tips:
- Always check for cuts, abrasions, or exposed wires before use.
- Inspect for damage if the cable has been run over or pinched.
- Clean off oil or chemical spills promptly to prevent long-term damage.
Partner with a Trusted SOOW Cable Supplier
When it comes to sourcing SOOW electrical cable you can trust, ZW CABLE is a name you can rely on. Our cables are engineered and tested to the highest standards, ensuring you get consistent quality and safety every time. Ready to power your next project with confidence? Contact ZW CABLE for a quote and discover the difference expertise makes.
