I spent the last few days putting remedy to one major deficiency I noted in my very first post to this thread. I've added a new 1 1/4" PCV conduit from the house out to the RR. I'd been procrastinating on this for a couple of years now. This is why:
These shots are of the only access I have to the crawl space where the conduit needs to run in the house. Like many of us on this forum, I'm hardly young, spry and svelte! Doing a belly crawl frontwards and backwards over the ledge to get in and out is not quite one of the joys of the hobby!
The step stool on the inside is to ease the two foot drop on the other side of the ledge. The step ladder is needed to get through the hole from the basement side. The primary reason I finally tackled this job was to get a S-88 data line out to the RR. I intend to put in some automation so trains are not just chasing each other around the loop. S-88 based sensors are supported by my Märklin CS3 Central Station.
I used a 2" diamond grit hole saw chucked in a 1/2" drill to cut a hole in the exterior brick facing of the wall. The hole was centered between the two 1/2" conduits originally installed. After I got through the brick I put a pilot drill in the hole saw in order to drill a centered hole in the 2x10 ledger board behind the brick facade. Then it was into the crawl space to complete the hole for the conduit through the ledger board with another 2" hole saw. I used the pilot hole as a guide to be sure the two holes were aligned. The hole through the wall was caulked with cement sealer after the interior part of the conduit run was finished. After four trips in and out of the crawl space to fit and glue the conduit sections together this is the result, a pull box on the exterior wall.
When this pic was taken I'd already run the wires to the interior of the house. I pulled two Cat 6 ethernet cables for S-88 busses. I chose Cat 6 cable over Cat 5e because of the length of run, about 35 feet, and its larger gauge wire, 23 awg vice 24 awg. One the twisted pairs are used for 12V power in the S-88 bus. The larger wire lessens the voltage drop due to wire resistance. I also put in another 12 awg 4-conductor line that will give me an additional two track power connections for the future. I had the wire left over from my initial installation years ago. Plus, I put pull cords in place should I want to run something else later. There is plenty of room for more wires in the conduit! Here is a pic of the wall plate where my CS3 Central Station inside the house connects the the RR. The wall plate attaches to a low-voltage box installed in the drywall.
Power for my two existing track zones is via the binding posts. Short jumpers with banana plugs make the power connections between the CS3 and the binding posts. The RJ-45 jacks are for S-88. Around 2 feet of the new 4-conductor power cable is coiled behind the box in the wall cavity. I'll put in another low-voltage box next to this one if or when I make use of the new power conductors.
The next few pics are of the exterior run.
The first couple show the trench dug down to the two existing 1/2" conduits. The new 1-1/4" conduit will emerge in waiting room for the station. The third pic above is of the new conduit in place after burrowing under the cement blocks beneath the rails. I added a 1/2" "U" shaped conduit under the rails while I was at it. This will make it easier to get sensor wires from the waiting room to the far track. The fourth pic is of the waiting room base plate and covered platform back in place after backfilling and wire pulling.
One more pic of the wall plate:
This one with the track power connections made. It also shows one of two Cat 6 pigtails I made to verify the Cat 6 RJ-45 jack and plug connections. I put a jumper cable on a wire pair at one end the checked for continuity with a VOM between the same pair at the other end. This was done for all 4 wire pairs of each cable. The out and back resistance for each pair was just under 2 ohms for those that might be curious.
And the final result, little evidence anything was accomplished: