Running adjacent ethernet and mains cables?

[newshound]

Are you quite sure? I *thought* the suppliers were giving you 240 as near as dammit because that is the permitted upper limit on nominally

230, and makes sure their sales stay up!

[dennis]

I've never seen one like that.

and I have used loads.

[dennis]

The transformers are small enough to fit in DIL packages or surface mount.

They always have transformers on twisted pair ethernet.

[Johny B Good]

If you don't know what to look for, it can seem that way but, in fact, looking at the bel fuse module number (S558-5999-46), a quick google confirms that it is in fact a bunch of miniscule isolating transformers potted into a DIL package as per this link:

They've always been there on 10base-T / 100base-TX/ 1000base-T cards starting in 1990. Not only did these transformers provided protection against contact faults with 240 v mains wiring, they also eliminated the hum loop induction that had plagued its cheapernet predecessor which relied on ceramic capacitors to provide this protection which did absolutely nothing against common mode interference.

HTH & HAND :-)

[Andrew]

The crimp-on connectors that Maplin sell are just connectors, nothing more. There must be something in the router/switch or on the Mboard to provide isolation.

[Tim Watts]

The magnetics are always in the device, not the cable or socket.

[John Rumm]

To clarify, they may be in the socket of the device (NIC, Switch etc) - never the wall sockets or patch panels of the structured wiring.

[John Rumm]

Its a wind up referring back to a recent thread... ;-)

[Alan Braggins]

has X-rays showing the difference between a socket with isolation and one without. (Without the X-ray, you can't see the transformers.)