Please stop what you are doing for now. Some of your bus wires should be 12 AWG. Check out www.wiringfordcc.com before proceeding further.
For power capacity, you will need a Ph5-R as your starting point, then add multiple Pb105A boosters. Both include power supplies.
Each Pb105A five-amp booster, including Ph5, can support 10 locos running simultaneously.
Divide the layout up based on loco traffic and capacity needs, not track length.
The number of tracks and the track length influence bus wire size, not the number of boosters.
All yards should be on separate boosters with breakers.
To avoid downtime, I highly recommend keeping a spare booster on hand for redundancy. Perhaps even an extra Ph5 system box.
For programming and working on locos, get a Power Cab. Do NOT connect this to the main layout, electrically or physically.
I would also run a dedicated DCC accessory booster for anything that needs DCC track power or DCC data, like stationary DCC switch decoders.
Each booster requires at least one EB1 circuit breaker. If a Booster is serving multiple power districts, each section needs its own EB1 breaker.
The breakers are preset to 1.5 amps. Set them to 4.1 before installing them.
For reversing loops. Each loop will need an AR10. The AR10 gets installed exactly like an EB1.
An AR10 is never placed inline before or after an EB1. It requires its own bus line right from the booster.
To monitor your booster's capacity usage, I recommend getting a DCC meter for each booster.
https://tonystrains.com/product/nce-5240326-dcc-meter-analyzer or https://tonystrains.com/catalogsearch/result/?q=rrampmeter
More boosters if needed- 5240056 PB105a 5 Amp booster including (P519) power supply
Circuit breakers for power districts - need a minimum of 1 per booster
5240225 EB1 V1.1 – Configurable Electronic Circuit Breaker
cab panel 5240207 UTP Panel Cab Bus fascia panel w/RJ12 connectors
cab for the operator – 5240039 Cab06 w/4-digit LED display, digital encoder, recall capability.
Procab 5240010
Wireless Pro Cab R 5240011
RJ12-7 seven ft six wire flat cable cab bus with RJ12 connectors 5240213
RJ12-12 twelve ft six wire flat cable cab bus with RJ12 connectors 5240214
RJ12-40 forty ft six wire flat cable cab bus with RJ12 connectors 5240220
Other things to consider:
Tortoise switch machine accessory controllers
5240151 Switch8-MK2 Accessory decoder for 8 Tortoise switch machines
5240152 Button Board Add-on for Switch8-Mk2 to add local pushbutton control
5240154 SwitchIt-Mk2 Accessory decoder for two stall motor switch machines
Automation, Routing, and Block Detection
5240230 Mini Panel used for task automation, build turnout, or CTC control panels
5240205 BD20 Block detector for DCC, .01 to 20 Amps
5240200 AIU01 Auxiliary Input Unit – Cab Bus Interface for detection.
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