Check the appliance plate: up to ~700W usually takes a 3A fuse; above that, 13A is common. Use BS 1362 fuses and follow the manufacturer’s instructions, don’t fit a higher rating to mask a fault.
Safe Overcurrent Protection & Fluorescent Starting Explained
Fuses & starters here cover plug-top safety fuses (BS 1362) for UK 13A plugs and glow starters for pre‑heat fluorescent fittings. The range typically includes 3A, 5A and 13A plug fuses plus 4–80W and 100–125W fluorescent starters for older magnetic‑ballast luminaires. These are used to restore protection and reliable lamp ignition during maintenance, whether you’re swapping a blown plug fuse or curing a flickering strip light.
Plug fuses protect the flexible lead in the event of a fault; common guidance is 3A for loads up to ~700W and 13A for higher power appliances, while 5A remains available for certain legacy or surge prone equipment. Always match BS 1362 markings and the appliance rating, and never up‑rate a fuse to stop it blowing. After replacing a fuse, check the flex and plug body; pairing with Switches and Socket & Switch Boxes helps with safe isolation and clean refits during minor electrical repairs.
Fluorescent starters marked FS‑U/FS‑** (e.g., 4–80W or 100–125W) are timed switches that pre‑heat the lamp electrodes, then open to deliver the voltage kick that strikes the tube; choose the wattage printed on the fitting or match the lamp. UK replacements conform to BS EN 60155 and suit single lamp, magnetic‑ballast fittings; electronic‑ballast or LED conversions usually don’t require a conventional starter. Use alongside tidy cabling and containment like Electrical Cable and Trunking & Conduit when refreshing older lighting runs.
Fuses & Starters FAQ's
Yes, 5A fuses exist, but the preferred BS 1363 plug fuse ratings are 3A and 13A. Keep the same rating as originally specified unless the appliance documentation states otherwise.
It’s a universal fluorescent starter for single‑lamp fittings covering tubes from 4W to 80W on 220–240V supplies. Replace like‑for‑like and power off before a quarter‑turn swap.
Many LED retrofits for magnetic fittings ship with a “dummy” starter (a safety link). If your fitting uses an electronic ballast, a conventional starter isn’t used, follow the LED lamp instructions.
Plug fuses are to BS 1362, with preferred ratings of 3A and 13A for BS 1363 plugs; fluorescent starters are covered by BS EN 60155.