600 Volt SO Rubber Insulated, 4-Wire

DIFFERENCE BETWEEN:

• 600 VOLT (SO), and

• 300 VOLT (SJO) Cords

SO and SJO rubber-insulated portable cords differ mainly in terms of voltage and application:

• SO (Severe Service) is 600V for heavy-duty industrial use with thicker insulation, while SJO (Junior Service) is 300V for lighter commercial/residential tasks, with thinner insulation and a smaller gauge range (e.g., 10-18 AWG).

• Both have oil-resistant (O) features, but SO handles higher power demands, whereas SJO is lighter and more flexible for appliances and temporary lighting.

         
600 Volt SO Rubber Insulated, 4-Wire

>  Cut-To-Length, Sold Price Per Foot, Typical Full Spool Length:  250'

KEY TAKEAWAY:  Choose SO/SOOW for heavy equipment, industrial machinery, or applications needing 600V.

Choose SJO/SJOOW for portable tools, temporary lighting, or smaller appliances with 300V limits.

The heavier SO jacket and thicker wire gauge reduces voltage drop and cord over-heating.