Extension Cord Elmo Tips – Extension Cord Codes

Filed in Extension Cord Tips by on January 8, 2015 • views: 639

Extension cord codes from Goodbuyguys.com

Extension Cord Codes – What Those Markings Really Mean

The Jackets of extension cords are covered with imprints or embossing indicating how and where they can appropriately be used.

It is essential to choose the correct cable jacket if you plan to use the extension cord in a demanding environment.

Here’s the key to some of that code as outlined in the National Electrical Code.

Extension Cord Key

S Hard Service Flexible Cord
SJ Junior Hard Service Flexible Cord
E Thermoplastic Elastomer Insulation
T Thermoplastic Insulation
O Jacket is Oil Resistant
OO Jacket & Conductors are Oil Resistant
R Thermoplastic Rubber Insulation
X Cross-linked Synthetic Polymer Insulation
HH High Temperature
W Moisture Resistant
N Nylon Jacket

Comments are closed.