Best Socket Tester for Caravans

The Kewtech KEWTST100 is a professional-grade socket tester that excels in caravan applications. It checks for all standard wiring faults including open earth, live/neutral reverse, and missing phases, and its built-in RCD trip test button allows you to verify that your caravan's residual current device is functioning correctly. Owner reviews consistently praise its reliability and the clarity of its LED indicators, which make fault identification straightforward even in poor light conditions.

Its rubber armour casing provides excellent protection against drops and knocks, a common hazard when working around a caravan. While it costs more than basic testers, the added RCD testing capability and robust build make it a worthwhile investment for regular caravan users who want to ensure their electrical system is safe.

The Sealey ST100 is a straightforward, no-frills socket tester that performs the essential task of checking for wiring faults with impressive accuracy. It covers all seven standard fault codes, including live/earth reverse and neutral faults, making it perfectly adequate for basic safety checks on your caravan's electrical hookup. Many owners appreciate its simplicity, as the clear LED indicators leave no room for confusion.

While it lacks an RCD trip test feature, which is a limitation for comprehensive safety checks, its low cost makes it an accessible option for occasional caravan users. The ABS plastic casing is adequate for light use, but it is not as impact-resistant as the rubber-armoured alternatives. For the price, it offers reliable fault detection without unnecessary complexity.

The Martindale EZ150 is built to withstand harsh conditions, making it a great companion for outdoor caravanning. Its IP54 rating means it is protected against dust ingress and splashing water, so you can use it confidently even in damp or dusty environments. It includes an RCD trip test function, allowing you to verify that your caravan's safety device will operate correctly in a fault condition.

Owner reviews highlight its robust build quality and the reassuring feel of the rubberised casing. The ergonomic grip makes it comfortable to hold, though its slightly larger size can make it a bit bulky for storing in a small toolkit. The LED indicators are clear, but some users find them less visible in bright sunlight. Overall, it is a durable and capable tester for those who prioritise longevity.

The Draper 65109 is a budget-friendly socket tester that delivers reliable performance for basic caravan electrical checks. It identifies all seven common wiring faults, including open earth and live/neutral reversal, using a simple and effective LED display. Its compact size makes it easy to carry in a glovebox or pocket, so you always have it on hand when setting up at a new campsite.

While it lacks an RCD trip test feature, which may be a drawback for some users, its low cost and dependable fault detection make it a popular choice among casual caravan owners. The plastic casing is functional but does not inspire the same confidence as more rugged alternatives. For those on a tight budget who need a straightforward tool for pre-hookup checks, the Draper 65109 offers excellent value.

The Megger MFT1835 is a professional multifunction tester that goes far beyond simple socket testing. It can measure insulation resistance, earth loop impedance, and perform variable RCD trip testing, making it suitable for caravan owners who want to conduct a full electrical installation test. Its accuracy and build quality are exceptional, and it is the tool of choice for many professional electricians.

For most caravan users, the MFT1835 is overkill due to its high cost and complex operation. However, for serious enthusiasts who maintain their own caravans and want to perform thorough periodic inspections, it offers capabilities that no simple socket tester can match. Owner reviews from professionals praise its reliability and precision, but note that it requires a good understanding of electrical testing to use effectively.