Wiring & Safety

How to size battery cables for a campervan — mm² ratings, current capacity, voltage drop calculations, and what cable to use for each circuit.

Circuit breakers vs fuses for campervan wiring — pros and cons of each, which to use for which circuits, and common UK campervan setups explained.

How to set up a 12V electrical panel in a campervan — fuse box options, DIN rail MCBs, bus bar layout, and labelling circuits properly.

How to connect a leisure battery in a campervan — main cable run, fusing, bus bars, negative earth connection, and integration with charge sources.

A complete pre-commissioning checklist for campervan electrical builds — 12V wiring, fusing, earthing, 230V safety checks, and what to test before going live.

How to make waterproof electrical connections in a campervan — heat shrink, marine connectors, junction boxes, and where moisture risks are highest.

Campervan battery isolator switch guide. When you need one, how to wire it, differences between leisure and vehicle battery isolation, and best switches to buy.

How to wire positive and negative bus bars in a campervan. Covers bus bar sizing, placement, cable connections, and how bus bars fit into a complete 12V system.

How to route and protect cables in a campervan. Covers cable trunking, conduit, looming, grommet use, and how to run cables neatly through a van conversion.

How to earth bond a campervan correctly. Covers chassis earth, 230V protective earth, bonding exposed metalwork, and common mistakes that cause shocks and fires.

Campervan electrical fire prevention — the causes, warning signs, how to build a fire-safe system, and what to do if a fire starts in your van.

Campervan fuse keeps blowing? Diagnose the cause step by step — overloaded circuit, partial short, wrong fuse rating, or undersized cable. Fixes included.

How to size fuses for every circuit in your campervan. Covers main fuse, blade fuse box, inline fuses, and the relationship between fuse rating and cable gauge.

Complete guide to Anderson plugs for campervans. Covers sizing, colour codes, wiring, and when to use them for solar panels, batteries, and accessories.

Complete guide to campervan wiring colour codes. UK standard colours for 12V DC, 230V AC, and vehicle wiring with labelling best practices.

Step-by-step guide to testing campervan wiring with a multimeter. Covers voltage, continuity, resistance, fuse testing, and fault finding.

Learn how to calculate voltage drop in your campervan 12V system. Includes the 3% rule, formula, worked examples, and fixes for excessive voltage drop.

How to route cables in a campervan safely and neatly. Covers planning, conduit, grommets, cable management, separation rules, and labelling.

Step-by-step guide to wiring a 12V blade fuse box in your campervan. Covers circuit planning, fuse sizing, and grounding.

How to calculate the correct wire gauge for your campervan. Includes formulas, voltage drop calculations, and a cable size reference table.

Why crimping is preferred over soldering in campervans. Covers vibration, heat cycling, crimp types, proper technique, and when soldering is acceptable.

Step-by-step guide to wiring 12V LED lights in a campervan. Covers light types, wire gauge, switching options, fuse sizing, and parallel vs series wiring.