SOOW vs STW Cable | What’s the difference

Introduction

Both SOOW and STW are types of flexible cords, both manufactured in accordance with UL62 standards.
SOOW is classified as an oil-resistant extra-hard service cord.
STW is classified as a non-oil-resistant extra-hard service cord.

These cables are both outdoor portable cables used in various applications and environments.
What are the specific differences between these two cables?
How should we choose the appropriate cable for our needs?

What is SOOW Cable?

Overview

SOOW cable is an outdoor portable power cable. It is suitable for powering portable tools and equipment, as well as small motors and related equipment.

Letter Meaning

The meaning of each letter in SOOW is as follows:

• S: Severe Service Cord – 600V (also 277/480 or 480V)

• O: Oil-resistant jacket

• O: Oil-resistant insulation

• W: Weather-resistant and water-resistant (for outdoor use)

Color Code

Cable Conductor Color Code Chart:

1. Black

2. White

3. Green (if needed)

4. Red (if needed)

5. Orange (if needed)

Materials and Temperature Ratings

According to UL 62 standards, SOOW can be made of various rubber materials or cross-linked materials as insulation and jackets. These materials have different characteristics.
Therefore, you will find that the parameters of SOOW cables from different manufacturers may vary.
Some SOOW cables can withstand temperatures up to 90°C, while others only up to 60°C.
The most common materials used are CPE jackets and EPDM insulation.
Some Chinese factories use cross-linked materials as sheathing, sacrificing flexibility for better weather resistance.

SOOW cables with CPE or cross-linked material sheathing can withstand temperatures up to 90°C (221°F) or even 125°C.
Typically, this cable is available in sizes ranging from 18 AWG to 2 AWG.
Some manufacturers may be able to produce larger sizes, but due to the manufacturing process, it is difficult to produce sizes smaller than 18 AWG.

Applications of SOOW Cable

Due to its weather resistance, water resistance, toughness, and flexibility, many contractors prefer to use this cable for outdoor applications and in harsh climates to provide power to portable equipment.

Its main applications include:

1. Industrial equipment

2. Heavy tools

3. Battery chargers

4. Portable lights

5. Welding leads

6. Marine dock-side power

7. Power extensions

8. Mining applications

Many people opt to slightly increase their budget when purchasing this cable to ensure more stable and safe performance.

What is STW Cable?

Overview

STW cable is an outdoor portable power supply cable. It is suitable for powering motors, small portable devices, and tools.

Letter Meaning

The meaning of each letter in STW is as follows:

• S: Severe Service Cord – 600V (also 277/480 or 480V)

• T: Thermoplastic

• W: Weather-resistant and water-resistant (for outdoor use)

Color Code

Cable Conductor Color Code Chart:

1. Black

2. White

3. Green (if needed)

4. Red (if needed)

5. Orange (if needed)

Materials and Temperature Ratings

According to UL 62 standards, the jacket of this cable is typically made of PVC material.
Depending on the type of PVC material used, the cable’s temperature resistance can reach 105°C, 90°C, or 75°C.
It is important to note that PVC material is not resistant to oil and chemical agents.
This cable may not be suitable for chemical plants or environments with oil.

The cable’s size range typically spans from 18 AWG to 6 AWG.
However, sizes such as 20 AWG and 24 AWG are also feasible.

Applications of STW Cable

Its primary applications include:

1. Outdoor camping power supply

2. Generator power supply

3. Power supply for large-scale events

4. Power supply for agricultural and livestock equipment

This cable is robust and durable, commonly used in various outdoor scenarios with a civilian focus.

Similarities Between SOOW and STW Cables

SOOW cables and STW cables are both outdoor heavy-duty power supply cables.
These cables are waterproof, weather-resistant, and extremely durable, capable of providing power to motors and lighting equipment in outdoor environments for extended periods.

This means they are suitable for common outdoor applications such as:

• Power supply for small outdoor events

• RV camping

• Construction sites

• Farms

As heavy-duty outdoor cables, both can withstand temperatures up to 90°C and have some UV resistance.
Their voltage rating reaches 600V when submerged in water.

Differences Between SOOW and STW Cables

The fundamental difference between SOOW and STW cables lies in their sheath materials:

• STW is made of PVC

• SOOW is made of rubber

The rubber sheath gives SOOW cables additional flexibility, oil resistance, and superior weather resistance.
As a result, SOOW cables are more suitable for use in:

• Chemical plants

• Oil-contaminated environments

• Industrial settings

In contrast, STW cables are lighter in weight and more cost-effective.
For sizes below 18 AWG, STW cables are suitable, capable of reaching 24 AWG and 26 AWG.
This makes them suitable for simple outdoor data transmission tasks.
Therefore, STW cables are more suited for residential outdoor applications.

Choose KMCABLE as Your Reliable Supplier

KMCABLE has specialized in cable production and export for over 15 years.
We are well-versed in various cable materials and production processes and can provide tailored cable solutions based on your requirements.
Please contact our experts if you need assistance.
We will respond within 12 hours.