Wallwasher Power Supply Unit
Output: 18v DC at 3.0A
Centre pin -
Outer sleeve (barrel) -
Measured output voltage = 18.5v
240v current used:
when the PSU is disconnected from the wallwasher = 0.035A / 8.4W
when the wallwasher is in standby = 0.05A / 12W
when wallwasher sidelights and sidelights are on max white = 0.1A / 24W
when all lights and fans and wrist rumbler are on = 0.15A / 36W
See the Wallwasher general page for details of the 18v current used by individual accessories and lights.
The current readings are approximate and can vary. It can be seen from the readings
that if you leave the unit on standby, you would use about 2kW a week. This is a
little more than having an energy-
Personally, I always prefer to turn my computer equipment off at the mains switch (when you shut a computer down, its PSU goes into standby, so the PC is still drawing current). Not because I’m a miser, but it avoids any risk of potential damage caused by spikes in the mains supply during thunderstorms etc. I do have surge protection, but I’m not sure if I trust it that much!
The Power Supply Unit (PSU) is unusual in that it has a plug at the end of the cable,
rather than a socket as usually found with PSUs. This is different from the common
2.1 or 2.5mm connectors that are readily available. The plug has an internal pin.
The connector used is the EIAJ-
The plug is used on some Sony laptops, such as the Vaio that has a 19.5v PSU.
See the Components / Where to buy page for details of where to buy the plug
You are unlikely to find an in-
Extending the cable
I haven’t taken a PSU apart but, because the cable is round, then I suspect that it uses single core shielded cable, with the shield being connected to the negative terminal at each end. Or it might just be two ordinary wires in the cable. Either way, it probably doesn’t really matter as it is only voltage and not signals that are being carried by the cable.
Use good quality cable and the largest you can get that will fit into the connectors.
This will help to prevent voltage drop, although this may not be a problem unless
the cable is very long. If you can’t get an in-
If all this sounds like a lot of hard work, it is!
The simplest (and possibly the cheapest) way to extend the overall length of the power connection is to extend the mains cable. This can be done in two ways:
If you only need a short extension, it may be possible to get a longer mains cable with the figure 8 socket on it that fits into the PSU.
The second option is to buy or make up an extension mains cable for the PSU to plug into. In the UK, this would have a 13A plug at one end and a 13A socket (or multiple sockets) at the other.