Knowledge Centre

Welcome to our Knowledge Centre!

This area of our site is devoted to unravelling the sometimes mysterious world of auto and marine electrics by providing you with some useful guides and resources to help you in your wiring projects. We're adding information all the time so please check back regularly to see what's new.


12 Volt Frequently Asked Questions (FAQs)

In this section are answers to many of the commonly asked technical questions related to 12 volt wiring. Use this as a quick reference to save you time when deciding what parts to select for your project..........Read more


Electrical Circuit Basics

Electricity is a fundamental part of the workings of most vehicles and this section aims to explain the basic principles. Hopefully this will give you an understanding and allow you to carry out some simple calculations for specifying the electrics in your auto or marine wiring projects.........Read more

Cable Sizing & Selection

One of the most important aspects of any wiring project is determining the correct size and type of cable to use for each circuit. Too small a cable size and you'll run the risk of generating heat in the cable; too large and you'll be wasting money on copper you don't need......Read more

Fusing Guide

Fuses are critical in any electrical system and are used to protect a circuit from excessive current that could lead to damage and, very often, an electrical fire. Excessive current is most likely to be caused by three things........Read more


Relay Guide

Relays are used extensively throughout all modern vehicle electrical systems. They are quite simple devices but very useful, so once you understand how they work and what they enable you to do it opens up a vast range of applications for your aftermarket projects.......Read more

Split Charging Guide

If you own a motorhome, campervan or boat then you'll probably need a 2nd battery to run all of your leisure electrics such as lights, coolbox/fridge, TV, navigation equipment, power sockets etc. In order to keep this 2nd battery charged you'll need to connect it to a power source such as your engine's alternator or a mains battery charger. This is what split charging is all about.......Read more

Auxiliary Battery Charging In Vehicles With 'Smart' Alternators

One of the emissions-reducing technologies that is now becoming standard on new vehicles, is  the 'smart' or 'intelligent' ECU-controlled alternator. Unfortunately traditional split charging systems using VSRs are not compatible with smart alternators so a battery-to-battery charger must be used instead.......Read more

LED Lighting Brightness Guide

Conventional lighting based upon incandescent filament bulbs is traditionally referred to as having an output in Watts. This allows us to have a good understanding of how bright it will be as there is an approximate correlation between power consumed by the bulb (Watts) and brightness.  The problem with LEDs is that they use much, much less power than conventional bulbs for an equivalent light output, so using Watts as a measure of comparing brightness is no longer useful.......Read more


Latest news: 
1 CommentFriday, 13 October 2017  |  Paul
Latest news for Oct 2017

This month we're discussing your options when it comes to selecting and wiring a fusebox and talking about the differences between parallel and series connections when wiring batteries together. Enjoy!

Thursday, 14 September 2017  |  Paul
Latest news for Sep 2017

This month we have extended our Sterling battery charger range and are announcing our switch to DPD for all courier deliveries.  We also have only a week left to go for entries to our Facebook dashcam competition, so enter before it's too late.

Friday, 28 July 2017  |  Paul
Latest news for Jul 2017 - Scanstrut products now available

This month we're happy to announce the addition of a range of products from Scanstrut, the international market leader in the design and manufacture of installation solutions for marine electronics.

Wednesday, 14 June 2017  |  Paul
Latest news for Jun 2017

Classic connectors back in stock, a new assortment kit and a YouTube video for crimping copper tube terminals.

Tuesday, 11 April 2017  |  Paul
Latest news for April 2017

An expanded range of switch panels, braided sleeving and new YouTube tutorials are on the menu this month.

1 CommentMonday, 27 March 2017  |  Craig
Supporting TCB in Mongol Rally 2017

We are proud to support the Taking Care of Business Team (TCB for short) in this years 2017 Mongol Rally. The team will try and cross 25 countries clocking up 20,000 miles in the process with no help or support!

Friday, 10 February 2017  |  Paul
Latest news for February 2017

An expanded range of switch panels, braided sleeving and new YouTube tutorials are on the menu this month.

Wednesday, 16 November 2016  |  Paul
Latest news for November 2016

This month we've added an LED brightness guide and Technical FAQ section to our Knowledge Centre. We've also reduced shipping charges for Highlands & Islands destinations - great news for our customers in those more remote areas!

Friday, 19 August 2016  |  Paul
Get Connected - New products for Aug 2016

We're now stocking the Blue Sea Systems range of weatherproof plugs, sockets and accessories designed specifically for use in harsh marine environments, as well as their new OLED voltmeter and twin fast charge 4.8A USB socket.

1 CommentFriday, 15 July 2016  |  Paul
Lighting The Way - New products for July 2016

This month we've added some of the best new LED lighting designs to our range to bring you even more choice when fitting out your boat or vehicle.




The information contained in our Knowledge Centre is provided in good faith and we do our best to ensure that it is accurate and up to date. However, we cannot be held responsible for any damage or loss arising from the use or mis-use of this information or from any errors contained herein. If you are in any doubt please consult a qualified auto or marine electrician.