The LH0749 Leviton 23661-SWP is a G13 medium-based, shunted* lamp holder with “flexible wings” for push fit mounting. The T8-T12 (G13 base) fluorescent or LED lamp holder has a rotary locking (turn and lock) insertion to keep the LED or fluorescent tubular lamps in a fixed position. The Leviton 23661-SWP is rated up to 660W-600V and is UL and CSA listed. The Leviton 23661-SWP has bottom quick connects that allows for easy installation of wiring and is also equipped with a locator post (also known as a post, stop or nib) that positions the socket on the fixture. Used with instant start ballasts and LED bulbs that require a shunted* lamp holder. It is made of durable polycarbonate. The Leviton 23661-SWP is similar to the BJB 26.292.6211.
*The primary difference between shunted and non-shunted lamp holders (also known as tombstones or sockets) lies in how the electrical current flows through them to the lamp pins:
Shunted Lamp Holders:
- Internal Connection: Shunted lamp holders have their two electrical contacts internally connected or "shunted." This means there's a single electrical path through the socket.
- Single Wiring Track: They receive voltage through a single set of wires that then spreads to both contacts that connect with the lamp pins.
- Continuity: If you test a shunted socket for continuity across its two contacts, a multimeter will show a closed circuit (it will beep or light up).
- Usage: Shunted lamp holders are typically used with:
o Instant start ballasts in fluorescent lighting. These ballasts provide a high initial voltage to start the lamp and require the pins at each end to be at the same electrical potential initially.
o Some plug-and-play LED tubes that are designed to work with existing instant start ballasts.
o Double-ended direct wire LED tubes: Although they can also work with non-shunted sockets, shunted sockets are an option.
o
Non-Shunted Lamp Holders:
- Separate Contacts: Non-shunted lamp holders have two separate electrical contacts that are not internally connected. This creates two distinct electrical paths.
- Dual Wiring Tracks: They require two separate wires (line and neutral) to connect to the two contacts within the socket. Each contact receives voltage independently.
- No Continuity: Testing a non-shunted socket for continuity across its two contacts will show an open circuit (no beep or light up on the multimeter).
Link to T8,T10,T12,lamps that fit this socket