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Installation and Operation

Owner’s Manual for Surge Protection Device 5

Section 3: Installation and Operation

Introduction to Installation

This section describes how to install a Surge Protection

Device (SPD) in parallel (shunt) across the AC supply of

a split phase electrical system.

Installation

Refer to the label on the SPD to verify the voltage rating

and wiring configuration of the SPD matches that of the

electrical system. Use an AC voltmeter to measure the

system line voltage to verify the correct model of SPD is

being installed. Damage to the SPD may result if it is

connected to an electrical system of a higher voltage or

different wiring configuration.

Mounting

SPD can be mounted directly to the electrical panel or

service equipment:

• Choose a mounting location for the SPD that

provides the shortest and straightest possible

wiring (lead length) from SPD to electrical system

connections. Excessive lead length and sharp

bends will degrade SPD performance.

• When installing SPD as a Type 2 SPD, SPD’s wire

leads are required to be terminated to a dedicated

2-pole 20 amp circuit breaker. Circuit breaker must

be approved for installation and use in the

panelboard by the panelboard manufacturer.

– Or, use appropriate screws to mount SPD to sur-

face and use conduit to connect SPD to electrical

panel.

• See Figure 3-2. When using conduit, avoid using

90° elbows (A) and keep conduit run as short and

straight as possible (B).

Conduit Installation

See Figure 3-1. Mount SPD directly to electrical panel

using a 1/2 in. locknut.

Figure 3-1. 1/2 in. Locknut Mounting

See Figure 3-2. When mounting SPD outdoors, use

weatherproof conduit and fittings to maintain the

enclosure’s NEMA 4 rating.

Figure 3-2. Conduit Installation

Wiring

When installing wiring:

• Follow all national, state, and local electrical codes

when making wiring connections.

• When connecting wires from SPD to electrical

system, cut wires as necessary to keep them as

short as possible.

• To maximize SPD’s performance, twist and bind

wires together to reduce impedance of wire (one

twist/inch).

1. See Figure 3-3. Connect SPD’s neutral wire (white)

to system’s neutral connection.

Figure 3-3. Split Phase Wiring Diagram

Type 2 Installation

2. Connect SPD’s phase A and B wires (black) to 2-pole

20 amp circuit breaker in electrical panel, and torque

circuit breaker terminals to the manufacturer's

required torque settings.

013266

A

B

013267

)

)

20A 2-Pole

Circuit

Breaker (not

provided)

013071

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