R624       *Use specified wire colors (mostly). All non-SIGNAL LEVEL wiring with a constant polarity (i.e., except for outputs of relay modules, motor controllers, or sensors) shall be color-coded along their entire length from the manufacturer as follows:

R621       *Protect circuits with appropriate circuit breakers. Each branch circuit must be protected by 1 and only 1 circuit breaker or fuse on the PD per Table 8‑3. No other electrical load can be connected to the breaker or fuse supplying this circuit with the exception of devices downstream of a permitted motor power adapter board placed between the PD and a motor controller (WCP-1380, WCP-1903, WCP-1904, RF-4003, RF-4004, RF-4005).

R609       *Connect main power safely. The following devices shall be connected with 6 AWG (7 SWG or 16 mm2) copper wire or larger as shown in Figure 8‑11:

R620       *Only use specified fuses in PD. The only fuses permitted for use in the PD are automotive blade fuses with the following values: