Best way to measure your bottle neck for a bung.

How to measure a bottle hole to determine the correct bung size needed.   The best way to measure the internal dimension of your bottle neck hole is to use a piece of card as seen in the steps below.   Step 1: Grab the bottle, a piece of card …

Wiring of a BC switched lampholder with internal earth

There are a couple of different ways that manufacturers provide the earth terminal in lampholders. S-Lilley which is a UK-based manufacturer use an internal earth connection so there is no terminal seen on the outside of the lampholder. The switched S Lilley lampholder provide 3 terminals on the inside in …