ES stands for Edison Screw. Just to confuse things there are several sizes. SES is Small Edison Screw (AKA ES14) The common size as used in the USA is about an inch in diameter, these are usually referred to as ES (AKA ES27) There are also some larger Edison Screw sizes used for industrial lamps. These are known as GES (Giant Edison Screw) and light bulbs of 150 watt and more often use GES. Smaller fittings tend to burn at powers over 150 watts.
A device for holding a lamp.
A lamp holder that turns on from a wall light switch not a switch on the device.
Common issues associated with a shunted lamp holder include flickering lights, dimming, or the lamp not turning on at all. These issues can be resolved by checking and replacing the wiring connections, ensuring the lamp holder is properly grounded, and replacing the lamp holder if necessary.
Your question does not supply enough information. There would be no reason to have a 'jumper' on a lamp holder under normal conditions and I don't know what "the other terminal" of a lamp holder is.
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what the function of lamp holder
From the rear trunk, remove carpet strip behind the lamp by unscrewing 2 plastic discs. You can then see the black plastic bulb holder assembly. Pull down on the black plastic tab on the lamp holder to release it. The complete lamp holder can then be gently guided out of the rear lamp assembly.
The Leviton porcelain lamp holder features a durable porcelain construction, a medium base socket, and a pull chain switch. It is rated for up to 660 watts and 250 volts. The lamp holder is suitable for use with incandescent, fluorescent, and LED bulbs.
Using a heat lamp with a higher wattage than the holder can handle can cause overheating, melting, or even a fire hazard. It is important to match the wattage of the bulb with the wattage rating of the holder to ensure safety and proper functioning.
A lamp holder is a device used to secure a light bulb or lamp in place, typically providing electrical connections for the bulb. It is commonly found in light fixtures and lamps to hold the bulb securely and allow it to be powered.