Summary
- Tests UK BS1363 13A socket wiring
- Tri-colour LEDs show wiring status
- Audible alerts confirm fault types
- Detects over 17 wiring fault modes
Megger MST220 Audible Socket Tester
The Megger MST220 Audible Socket Tester provides a fast way to check the wiring condition of UK BS1363 13A sockets. Simply plug the unit into a socket and it starts the test immediately. Clear visual and audible feedback helps users identify wiring issues without delay.
Designed for installation, maintenance and inspection work, the tester helps reduce time spent diagnosing socket faults. Bright tri-colour LEDs display the test result clearly. At the same time, an audible signal provides extra confirmation of the socket condition.
Fast Fault Identification
Using the Megger MST220 Audible Socket Tester allows electricians to identify common wiring problems quickly. The tester can detect more than 17 fault conditions. This includes missing wires as well as incorrect and reversed connections.
Visual indications are simple to understand and easy to read in day-to-day working environments. A continuous tone and green LED indication show correct wiring. However, different LED patterns and a warble tone indicate when a fault is present.
Built for Routine Testing
The Megger MST220 Audible Socket Tester is suitable for commissioning, maintenance and general inspection tasks. Its plug-in design requires no batteries, making it ready whenever needed. As a result, users can carry out checks with minimal setup time.
Rugged construction supports regular use on site and during service work. Compliance with BS7671 requirements helps support electrical testing procedures. Furthermore, the combination of audible and visual indications improves confidence when checking socket wiring.
Key Features
- Checks wiring condition of UK BS1363 13A sockets
- Provides both visual and audible fault indication
- Tri-colour LED status display
- Continuous tone confirms correct wiring
- Warble tone indicates detected wiring faults
- Identifies more than 17 fault conditions
- Detects missing wiring connections
- Detects incorrect wiring arrangements
- Detects reversed connection conditions
- Plug-in operation for quick testing
- Suitable for installation work
- Suitable for maintenance inspections
- Supports commissioning activities
- Designed for rapid socket diagnostics
- Rugged construction for regular use
Technical Specifications
| Product | Megger MST220 Audible Socket Tester |
| Socket type | UK BS1363 13A 3-pin sockets |
| Visual indication | Tri-coloured LEDs |
| LED colours | Green, red and amber |
| Audible indication | Integrated sounder |
| Correct wiring indication | Continuous tone with green LEDs |
| Fault indication | Warble tone with LED fault pattern |
| Detectable faults | More than 17 wiring fault conditions |
| Fault coverage | Missing wires and reversed connections among detectable faults |
| Compliance | BS7671 |
| Supply rating | 230V AC 50/60Hz single phase |
| Current draw | <15mA maximum |
| Operating temperature | 0°C to 40°C |
| Humidity | <95% non-condensing |
| Safety rating | EN61010 |
| Dimensions | 67mm (W) x 78mm (H) x 58.5mm (D) |
| Weight | 74g |
| Power source | Plug-in operation with no batteries required |
| Application | Socket testing, installation, maintenance and commissioning |
| Warranty | Not specified |
Comparison Table
| Feature | Correct Wiring | Fault Condition |
| LED indication | Green LEDs | Red, amber and green LED combinations |
| Audible indication | Continuous tone | Warble tone |
| User action | Wiring confirmed | Further investigation required |
| Purpose | Verify socket wiring | Identify wiring faults |
Document Downloads
What’s Included
- Megger MST220 Audible Socket Tester

