[Fil Clara, Timesh Mistry]

During the Earthquake, we went to the X end to unplug the ACDC power to the Beckhoff Motor Controller. This was to understand if the electronics we installed were causing any glitches in DARM (since Detchar has been noticing some glitches at the X end that coincide with the NCAL installation). With a flick of the switch, the DC power supply was turned off then we unplugged the power at around 0930 LHO time (1730 UTC) and will leave it unplugged until the next Tuesday maintenance period. 

Furthermore, we took the opportunity to look for better option for plugging in the power and running the power cables. We found three possible socket locations to plug the power into:

The first is located on the support structure for BSC5 as seen by the zoomed in image of the socket and the relative location can be seen in the zoomed out image. The black cable seen in the image is connected to a power strip however, there is nothing connected to the power strip so we could replace the black cable with the NCAL Beckhoff Motor Controller power. 

The second location is a socket located on BSC9 as seen in the zoomed in figure. The lower yellow cable runs to the top of the HWS table however there is nothing plugged into it. There was a black box that used to be powered by this power cable but is currently disconnected. Therefore, it may be possible to disconnect the yellow power cable and power the NCAL Motor Controller from this socket. This is the most favourable location because it is the closest socket to the motor controller box/chassis. 

The third location is a sockets that rises up from the floor. The zoomed image shows the name of the socket and the zoomed out image gives it relative location to the -X-Y HEPI pier and the HWS table.  It is not clear if both sockets are required so we will need to check with the HWS team if it is possible to use one of these sockets. 

We will confirm with the vacuum and HWS teams which socket location is the most suitable.