Premises Wiring Standards. The premises wiring currently installed in the Sheriff's Department Custody and Detention Facilities and the Probation Department Detention and Camp Facilities complies with the National Electrical Code and the County’s Commercial Building Telecommunications Wiring Standard 902 which will be made available to Contractor upon request. All premises wiring systems installed by Contractor shall be in accordance with the National Electrical Code and the County’s Commercial Building Telecommunications Wiring Standard 902. All premises wiring systems installed by Contractor shall be concealed or installed in metal conduit and shall remain the property of the County.