Installation Instructions
SX-N240
Line Connection
CAUTION: The SX-N240 is designed for use with 20 Amp 208 Volt two-phase
services or 20 Amp 240 Volt split-phase services only. That is, services with
two hot wires (or phases), a neutral wire, and a ground wire. A neutral must
be connected to the SX-N240 even if it is not used for the load.
The SurgeX SX-N240 product is rated at a load capacity of 20 Amps per leg and
shall be wired only by qualified Electricians using 12 Ga. conductors as specified
in Article 310 of the 1999 National Electric Code, as set forth in Table 310-13.
Any type of conductor suitable for use in wet or dry locations such as (but not
limited to) THHN, THHW, THW, THWN, or TW shall be considered acceptable
if local Code permits. The service to which the product is connected must be
protected by a dual 20 Amp circuit breaker.
Connect the wires from the electrical service (line) to the upper terminal block
labeled ‘Line’ as follows:
• The two phases or hot wires to the two 120V terminals
• The White wire to Neutral
• The Ground wire to Ground
Load Connection
Connect the wires to the equipment (load) to the lower terminal block labeled
‘Load’ as follows:
• The two phases or hot wires to the two 120V terminals
• The White wire to Neutral
• The Ground wire to Ground
Indicator Lights
There are two green indicator lights on the front of the unit. These green lights are
Self-Test indicators that indicate power is applied to the unit and the internal surge
protection circuitry is fully functional. There is one indicator for each of the two
surge protection modules.
