26 43 00 SURGE PROTECTIVE DEVICES

26 43 13 Surge Protective Devices for Low-Voltage Electrical Power Circuits

.01 General

1. Service Entrance – Provide SPD at each building service.  Unit should typically be 240 kA per phase, 120 kA per mode (including all phases and phase to ground), but confirm actual rating with Engineering Services.  Unit to have disconnect and field replaceable MOV’s. 
2. Panelboard - Provide SPD at panels serving predominantly computer loads (server rooms), any exterior loads, and as directed.  Unit should typically be 160 kA per phase, 80kA per mode (including all phases and phase to ground), but confirm actual rating with Engineering Services.
3. Integral mounting within the electrical equipment is preferable, but surface mounting is acceptable, as approved by Engineering Services (keep the leads to the bus 60 inches or less).  
4. Unit shall comply with most recent edition of UL 1449 and UL 1283.