Specification Sheet

STV100K Series Instruction Manual • 5
1.4MechanicalDimensions
Figure 1: Mechanical Dimensions (in.)
Unit shown is a three-phase wye
1.5VoltageProtectionRatings(VPRs)
To maintain the voltage protection ratings marked on these products, as obtained
by Underwriters Laboratories, Inc. in accordance with ANSI/UL 1449, 3
rd
edition,
the Standard for Safety, Surge Protective Devices (SPDs), #12 AWG wire must
be utilized to connect the STV100K Series to your facility’s power grid. Connec-
tions made with conductors other that #12 AWG may result in different VPRs.
1.6CircuitAmpacityLimitations
This device has been investigated by Underwriters Laboratories, Inc. to with-
stand, without exposing live circuits or components on power sources, a voltage
of two times (2x) the device’s ratings, and fault currents of up to 65,000 AIC, as
described in ANSI/UL 1449, 3
rd
edition, the Standard for Safety, Surge Protective
Devices (SPDs).
1.7WireSizing/Routing
Phase, N, and GND wires are #12 AWG. NO, NC, and COM wires are #18 AWG.
To reduce the wiring impedance to surge currents, we recommend the phase,
neutral (if required), and ground conductors to be twisted together and routed in
the same raceway (conduit). Avoid any sharp bends in the conductors. All wiring
must comply with the National Electrical Code (NEC) and applicable local codes.