Black & Decker The Complete Guide to Wiring Updated 8th Edition (Black & Decker Complete Guide) by Editors of Cool Springs Press

Author:Editors of Cool Springs Press
Language: eng
Format: azw3
Publisher: Cool Springs Press
Published: 2022-01-11T00:00:00+00:00

Surge-Protective Devices

TOOLS & MATERIALS

Hammer

Combination tool

Screwdrivers

Cable ripper

Linesman’s pliers

Circuit tester

Crimping tools

Whole-house surge arrestor

Conduit nipple and locknuts

Two 15- or 20-amp single-pole breakers

Coaxial cable and terminators

UTP cable and terminators

Electrical surges caused by lighting or utility malfunctions can destroy or seriously damage sensitive electronics. Many homes contain tens of thousands of dollars worth of computers and home entertainment equipment protected by no more than a $10 plug-in surge suppressor. While these devices do afford a modest level of protection, they are no match for the voltage a lightning strike will push through a system. And they offer no protection for the wiring itself. Surge-protective devices (SPD), or whole-house surge arrestors, provide comprehensive protection for the wiring and devices attached to it. The NEC now requires surge protection for new and replacement services.

Surge-protective devices (SPD) are available in two basic types. Type I (SPD I) devices may be installed on the utility (line) side of the service equipment (main circuit breaker) or may be installed on the load side of the service equipment. Type II (SPD II) devices may be installed only on the load side of the service equipment. Do not attempt to install anything on the line side of the service equipment. Leave this work to a licensed electrician.

Manufacturers offer units that are housed in separate boxes (these look like a small subpanel) as well as models that are designed to replace a double-pole breaker in the panel itself. These install like standard breakers. Both types provide protection for the whole house. Freestanding models are also available with separate protection for phone, data, and cable-television lines—a wise addition if you need to protect networked computers or cable-TV receivers.

Whatever style you choose, look for models with the Underwriters Laboratories 1449 rating and indicator lights showing that the system is protected. Most manufacturers also include a warranty against defect that covers a certain amount of property damage.

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