Wiremold OFR series Overfloor Raceway System provides four-channels of capacity and access to a wide range of power, communications and A/V connectivity options in the smallest, lowest, narrowest, ADA compliant profile available in overfloor raceway systems. This system installs over existing floor coverings and is both tamper-resistant and installer-friendly, making it an ideal solution for relocatable or permanent installations where access through floors and ceilings is not an option. from behind wall. Configurable to provide one or two channels of power. It has a 1/2" trade size knockout for single channel and 3/4" trade knockouts for two channel.