Bayonet Cap Fitting Sizes

For bulbs powered by ac current the thread is generally connected to neutral and the.

Bayonet cap fitting sizes.

The lower case letter s or d specifies whether the bulb has single or double contacts. The bulbs have right hand threaded metal bases caps which screw into matching threaded sockets lamp holders. Therefore gu4 and gu5 3 fittings are commonly found on low voltage wattage lamps and often have a push fit action. They are used in a variety of lighting around the home and one of the most common types of fittings.

Ba15 a 15 mm base can also be referred to as sbc standing for small bayonet cap. This cap is the standard 27mm diameter screw cap for uk 240v light bulbs not to be confused with e26 which is a 26mm size and is designed for the 120v us market. The most common code is for bayonet caps is b22. Gu10 the letter g indicates a bi pin or two pin base but because gu10s have a twist and lock mechanism they are classified as a type of bayonet.

Most standard light fittings will take either 27 screw cap edison bulbs e27 or 22 inch bayonet cap bulbs b22d. Edison screw es is a standard lightbulb socket for electric light bulbs. Suitable for commercial and residential applications they are often used in ceiling fittings in the home. The most popular es or e27 fitting is 27mm diameter and is widely used in uk and europe.

The number refers to the diameter of the base e g ba22 is a 22 mm diameter bayonet cap lamp. In this case you will need to look closely at the fitting type and do a quick diameter measurement. If your fittings are empty. Bayonet cap bulbs use a twist and lock action to secure into the fitting.

The standard size for bayonet caps has a smooth metallic base and is 22mm in diameter with two moveable pins on either side but bayonet caps are available in a range of large and small sizes. Bayonet bases or caps are often abbreviated to ba often with a number after. A range bc light bulbs also known as b22 and bayonet cap available in various sizes colour temperatures styles lumens and technologies from trusted trade brands. Gu10 fittings are distinctive by their twist and lock fitting action and are common in domestic applications.