Power Cord C19-C20 SJT 250V 20Amp Black jacket 4 ft Our C19-C20 power cords are designed specifically for data center and lab environments. The C19-C20 power cord is most commonly used between a High-End PDU and a server in a data cabinet. In data environments, you should keep the length of cords to a minimum to avoid contact with ethernet cables and reduce power loss. Unirise power cables are all UL certified, RoHS compliant and rated to 250V.