Mark feed points, driver position, and cable routes
Now add the electrics. Put an arrow at the end of each run showing which end takes power, then draw its cable back to where the supply will live. Follow the route the cable can take, through the back panel, along the joist, down the stud bay, and write that length down too.
The driver position is a decision, not an afterthought. It needs air, since both strip and supply give off heat, and it must stay reachable once the job is finished. Distance also costs voltage, so the supply wants to sit near the middle of the load it feeds.
Draw every run as its own pair returning to the supply. That is what parallel wiring looks like on paper, and it is the arrangement constant voltage strips require; nothing is chained one behind the next in series. Our comparison of parallel and series strip wiring shows why the difference matters.
Total the load on the page
The drawing is where the load gets added up. Beside each run, write its watts per foot figure and multiply by that run's length. Sum the runs feeding one supply, then mark a driver at least 20 percent above the total to leave current headroom (verify the headroom guidance and any published capacity before ordering). Add each product's published maximum run length beside its line as well, because a run longer than its own limit needs a second feed.
Put the voltage next to every run, so 12V and 24V products cannot end up sharing a supply by accident. If the project needs both, they get separate supplies and the diagram shows two, clearly labeled. Compare the totals against the ratings in the power supply range before choosing.
Show zones and control on the same LED wiring diagram
Circle each group of runs that should behave as one and label it. A cove, an under cabinet line, and a toe kick might be one zone or three, and the drawing is the cheapest place to argue about it. Assign each zone to a controller channel or wall device, and note the current it will carry.
Compatibility is a question the diagram can flag but not answer. Whether a given strip, driver, dimmer, and controller dim smoothly has to be confirmed against each part's documentation and then tested as a set. Keep methods separate too: a phase cut wall dimmer does not belong on the same circuit as a smart low voltage controller unless the documentation for both permits it.
Everything on the line voltage side, the branch circuit, any hardwired driver, junction boxes, and wall plates, goes to a licensed electrician, working from manufacturer instructions, local code, and NEC rules where applicable. Isolate the supply first, then mark those items and hand them over.
Mark the joins, the injections, and the slack
Put a symbol wherever two lengths meet and note how the join is made, since some products take a compatible connector, some are meant to be soldered, and the method belongs to the product. Mark power injection points the same way, with their cable routes drawn back to the supply.
Then add slack. Write an allowance beside each cable length for the pull out, the loop at the driver, and the route being less direct than it looks. Cutting exactly to the drawn dimension finishes short.
