What is a Class P ballast?
Class P: A ballast for a fluorescent lamp which meets the requirements of the Underwriters’ Laboratories, Inc.; includes an automatic resetting thermal protector to remove the ballast from the circuit if its temperature exceeds a specified value. 4. Same as constant-wattage ballast.
Which ballast is used in sodium lamp?
Operation. The inductive ballast is made up of a coiled wire. The coil creates a magnetic field inside when a current is applied. It stores the energy of the current in the magnetic field it creates.
What is the GREY red wire on the ballast for?
The gray/red wire is the return path for the second set of lamps. In other words, it is the neutral for the second set of lamps.
Can a 4 bulb ballast work with 3 bulbs?
2 Answers. Newer electronic ballasts run fine with lamps removed. Many replacement ballasts can be wired for several combinations of lamps, such that a 4-lamp ballast can be wired to a 3 or 2 lamp fixture. This will be shown right on the label and wiring diagram.
What is the yellow wire on a ballast?
The common yellow wires connect from the ballast to push-in connectors on one of the right holders of lamp 1 or 2. Two yellow wires connect the common lampholders together.
How big is a fluorescent ballast wiring diagram?
Fluorescent Ballast Wiring Diagram – 8 foot fluorescent ballast wiring diagram, advance fluorescent ballast wiring diagram, compact fluorescent ballast wiring diagram, Every electric arrangement is composed of various diverse pieces. Each component ought to be placed and connected with different parts in particular manner.
Can a ballast be wired in parallel or series?
Instant start ballasts can only be wired in parallel according to the diagram on the ballast. Changing the wiring on a fluorescent light fixture from rapid start to instant start, involves changing the wiring from series to parallel. Grounding a ballast is very important. Grounding is usually automatic if the light fixture is grounded properly.
Where does the wiring go in a ballast tank?
Individual ballast wires each connect to a lampholder on one side of each tube. The common wire (s) connect to all of the lampholders on the other side of the tubes.
What kind of ballast is needed for switch start?
Switch start is the control gear that has been used by the industry for years. They are general considered old technology and less manufacturers are creating them. Switch start requires a wire wound magnet choke of ballast.