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NEMA LSD 29

Incompatibility of T8 Ballasts (RS, PS, Dimming) and “Shunted” Bi-Pin Lampholders

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Organization: NEMA
Publication Date: 1 January 2019
Status: active
Page Count: 3
scope:

Introduction

Numerous ballast manufacturers have received and verified reports of incorrect applications of shunted bi-pin lampholders (tombstones) used with rapid-start (RS), programmed start (PS), and dimming ballasts. These incorrect applications have occurred in both new luminaires and field lamp and ballast retrofits.

For the purposes of this discussion, ballasts operating T8 rapid start lamps can be divided into two classifications; rapid-start and instant-start.

Document History

NEMA LSD 29
January 1, 2019
Incompatibility of T8 Ballasts (RS, PS, Dimming) and “Shunted” Bi-Pin Lampholders
Introduction Numerous ballast manufacturers have received and verified reports of incorrect applications of shunted bi-pin lampholders (tombstones) used with rapid-start (RS), programmed start (PS),...
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