Want to connect a PC upstairs with network downstairs without using
The upstairs and downstairs circuits are on different ends of a split
load fusebox with each end having its own RCD.
There seem to be conflicting reports of how Home Plugs would cope with
this. Anyone got any first hand experience?
TIA for any ideas
They will still have a common neutral the other side of the RCDs. Or are you
suggesting there is enough inductance in an RCD to filter out the RF? I'd
always assumed it was the meter impedance which stopped the neighbours from
I'm interested too because I use home plugs occasionally so that visitors
can use laptops in unwired rooms, and I have a split load box to put in when
I get round to it...
Well, the neutral in an RCD goes through a current transformer and whilst
that doesn't present a lot of inductance, the effective reactance at higher
frequencies (like the homeplug carrier) *might* be significant.
It would be a case of suck it and see (or borrow a couple of units).
Managers, politicians and environmentalists: Nature's carbon buffer.
Here I have Homeplug 1 - extension lead - ring main to consumer unit
(MCB) - out through another MCB - underground cable to garage - another
consumer unit with RCD and MCB - another ring main - another extension
lead - Homeplug 2.
Not quite the same, I know, and it won't break any speed records, but
it's been perfectly reliable for several years now.
Yup, just did a test for you using a pair of Solwise 85Mbps home plugs.
Connection end to end was:
Computer 1 (3GHz P4 HT WinXP) ->
gigabit switch ->
IT cabinet radial circuit ->
House split load CU with B6 MCB ->
MK 100mA Type S RCD ->
Henley block ->
Outbuilding split load CU ->
MK 100mA Type S RCD ->
30A HRC Fuse ->
Cable run to workshop (20m) ->
Workshop split load CU ->
Incomer Switch ->
30mA RCD ->
B32 MCB ->
ring final circuit (approx 40m round trip) ->
P3 600MHz laptop (Win2k).
Indicated speed on homeplug utility approx 19 Mbps
Real world test file copy at windows desktop managed a throughput of
approx 700KBytes / sec so probably in the region of 8 - 9Mbit when you
strip away the windows SMB overhead and TCP/IP etc.
A second test going to homplug2 placed on a B32 MCB on the 30mA RCD
(Hager) of the house CU also reported the same connection speed. That
would include 1 RCD and 2 MCBs in the path rather than 3 RCDs, 2 MCBs,
and 1 HRC Fuse in circuit.
Hence I would guess the RCDs make little if any difference to
throughput. MCBs however may have an effect - not yet verified.
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