The Martindale CP501 Check Plug is a quick and reliable socket tester designed for UK electricians who need to verify that 13A sockets are wired correctly. With a simple three-LED display, it instantly confirms correct wiring and identifies common faults, saving time during installations, inspections and maintenance work.
How does the CP501 help electricians on-site?
Built for daily use, the CP501’s tough ABS case and fail-safe LED indication system make socket testing straightforward and dependable. It’s ideal for electricians performing quick safety checks or fault-finding on fixed wiring installations.
Order today to enjoy free delivery, expert support and our 90-day satisfaction guarantee. Need advice? Our team is here to assist you.
Why choose Instrotech for your electrical test equipment?
With over 40 years’ experience supporting UK electricians, technicians and engineers, Instrotech is your trusted partner for quality tools and expert service. When you purchase from us, you benefit from:
Free UK shipping on all orders
Access to our knowledgeable technical support team
Available calibration services to maintain safety compliance
A 90-day money-back guarantee for complete peace of mind
We’re committed to helping you work safely and efficiently with industry-leading products and ongoing support.
