Keyword Analysis & Research: non shunted tombstone wiring

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Frequently Asked Questions

How do shunted and non-shunted tombstones work?

Non-shunted sockets send voltage to each of the contacts, through two wiring tracks. Now that you understand how shunted and non-shunted tombstones work and how they are different, here's the information you've been waiting for: when to use which type.

Can tombstone sockets be used with LED tubes?

Shunted sockets must be replaced with a non-shunted type for the ballast bypass single end live power LED retrofit lamp to operate properly. If there is no continuity across the contacts, the tombstone sockets are non-shunted and can be used with the LED tubes. We call these types of installations hard-wired, ballast bypass, or direct wire.

What is a non-shunted socket and how does it work?

Non-shunted sockets have separate contacts – or points of entry for the wires – creating two tracks for the electrical current to travel. Non-shunted sockets have contacts that are not joined or connected.

What is the difference between shunted and non shunted lampholders?

In non-shunted lampholders, or tombstones, current flows through multiple paths and in shunted tombstones current flows through a single path. Rapid start, programmed start, and dimming ballasts use non-shunted lampholders to provide power through the lamp’s cathodes before the lamp is turned on.

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