For BE at least, I would favour the use of 'power'; 'outlet' is probably more AE, I think.

'power outlets' is OK, but technically, I like it less myself.

If you don't like using the word sockets twice, you could say 'power sockets and RJ45 outlets', that would be technically OK too.

In layman's terms, we'd say 'mains sockets' for PC here, but I wouldn't use that if your context is a more technical one, unless intended for a lay readership.

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Note added at 33 mins (2005-05-06 13:23:05 GMT)
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\'socket outlet\' is also often found for power sockets, but personally I deprecate this, as it is both an unnecessary duplication, and alos less explicit, since it omits the reference to \'power\' that is implicit in \'prise de courant\' (don\'t forget, the literal translation of that would be \'power outlet\')

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Note added at 52 mins (2005-05-06 13:42:52 GMT)
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Nathalie\'s \'connector\' throws up an interesting point, which has cropped up before. When do you call it a plug, a socket, or a connector? Generally speaking, one tends to think of a plug as being male (has pins) and a socket as being female (has receptacles); but also, we tend to think of a plug as being the part that is mounted on the cable, and the socket the (possibly fixed) thing it plugs into.

Connector is a nicely non-specific word that can be used to cover all possibilities; but we tend to use it more in terms of describing either the style or type of connector, or the fact that there is a means of plugging something in and out (i.e. it is not hard-wired).

So to my technician\'s ears, talking about fitting RJ45 (etc.) connectors to an office space, for example, doesn\'t ring true. One might well say that \"all computers will be fitted with RJ45 connectors\", and equally, that \"mating wall-mounted connectors must be supplied\".

But if we are just talking about the provision of connection points for power and computer networks, my favourite would be \'power sockets and RJ45 sockets\' --- or I guess you could get away with saying just \'power and RJ45 sockets\'

\'outlet\', \'power point\' and \'electricity socket\' are all rather more layman\'s terms, which would be totally appropriate in an estate agent\'s description of a kitchen in a house for sale: \"4 double sockets plus a telephone point and a TV aerial outlet\", but sound uncomfortably homespun on a more formal, technical context --- and as Chris says, the use of \'plug\' is VERY colloquial indeed: \"Oh, you can never seem to find a spare plug when you need one!\" and would certainly not be appropriate here.