Large 3-prong round-pin plug, the 15-amp cousin of Type D. Used primarily in South Africa, India, and for large appliances in Hong Kong.
Direct Specification Summary
Type M is an earthed (grounded) electrical plug standard rated for 15A maximum amperage and typical voltages of 230V. Sockets are engineered with Three round pins in triangle: Earth pin 8.7 mm diam; Live/Neutral 7.05 mm diam.
Standard Property
Technical Specification
Standard Designation
Type M (BS 546 15A)
Grounding / Earthing
Yes (Earthed protective pin or side clips)
Pin Count & Geometry
3 Pins — Three round pins in triangle: Earth pin 8.7 mm diam; Live/Neutral 7.05 mm diam
Maximum Current Rating
15A
Nominal Voltage Range
230V
Grounding Status
Grounded (Earthed)
3 Pins • 15A Maximum
Typical Voltage Range
230V
Physical: Three round pins in triangle: Earth pin 8.7 mm diam; Live/Neutral 7.05 mm diam
Countries & Territories Using Type M
Type M is officially deployed in the national grid or hotel accommodations of the following countries:
The mechanical architecture of Type M is defined by Three round pins in triangle: Earth pin 8.7 mm diam; Live/Neutral 7.05 mm diam. Sockets engineered for this standard operate at nominal capacities up to 15A.
When traveling with equipment utilizing this plug, verify that the foreign receptacle is compatible with its physical grounding structure. Using 3-to-2 prong grounding cheater adapters can remove protective earth bonding, exposing metallic device housings to live chassis fault risks.