Electrical Equipment · Plug & Receptacle Adaptors
ADAPTOR 2-FLAT PIN (O) PLUG &, 2 PIN (A/B/C/SE) RECEPTACLE 792955
Adaptor with an O-type plug (two angled flat pins) and a socket for A, B, C and SE plugs: the letter codes, neighbouring adaptors, and voltage.
What it is
IMPA 792955 is a plug adaptor. Its plug is a 2-flat-pin "O" type, and its socket takes "A", "B", "C" and "SE" plugs. Those letters are the travel-adaptor socket types. O is the socket with two flat pins set in an inverted V, used in countries such as Australia and New Zealand. A is the flat-pin type of the United States, Canada and Japan, and B, C and SE are round-pin types used in countries such as Italy, Austria, Germany, France and Switzerland.[1]
So the adaptor lets a crew member plug an appliance with flat parallel pins or European round pins into an O-type outlet, on board or ashore.[1]
How to specify and order it
Pick the adaptor by the outlet it must go into, the plug letter. The neighbouring codes have the same receptacle idea with a different plug: B (792954), SE (792956), BF (792957), B3 (792958), O2 (792959), A (792960 and 792961) and C (792962). The patent links BF with England, Singapore and Hong Kong, and B3 with India and Indonesia. O2 is the angled flat-pin type with a flat earth pin, which it links with China.[1]
The O plug on this adaptor has two pins, while O2 adds the earth pin. So 792955 has nothing to carry an earth through. For appliances that need an earth, look at the O2 adaptor, 792959, and check that the appliance plug really mates with it.[1]
An adaptor matches the pin shapes only. Check the appliance’s rating plate against the outlet’s supply before plugging in. Ask the supplier for the current rating of the adaptor offered, and do not run a heater or kettle through one without checking it.
Rules and approvals
The UK Code of Safe Working Practices for Merchant Seafarers says not to connect any personal electrical appliance to the ship’s supply without a responsible officer’s approval. It also says not to use makeshift plugs, sockets or fuses, and not to overload circuits. It warns that a wrong connection on domestic equipment brought on board could prove fatal. Treat an adaptor as part of the appliance check, not a way round it.[2]
Questions buyers ask
- What is an O-type plug?
- In the travel-adaptor lettering, O is the plug with two flat pins set in an inverted V, used in countries such as Australia and New Zealand. O2 is the same pin layout with a flat earth pin, associated with China.
- Does a plug adaptor convert 110 V to 220 V?
- No. An adaptor changes only the pin shape, not the voltage or frequency. Check the appliance’s rating plate against the supply first.
Sources
- US patent 6780034 B2: Coalescent type power supply conversion plug adapter (definitions of socket types A, B, B3, BF, C, SE, O, O2)
- UK MCA: Code of Safe Working Practices for Merchant Seafarers (COSWP), 2024 edition
No prices: offers come from suppliers at the port.
Published by Sherif Awad, founder of GeoMarineHub — in ship supply since 1990, a family business since 1981 (45 years). Last checked .
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