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R623       *Use only appropriate connectors. Branch circuits may include intermediate elements such as COTS connectors, splices, COTS flexible/rolling/sliding contacts, and COTS slip rings, as long as the entire electrical pathway is via appropriately gauged/rated elements.

Slip rings containing mercury are prohibited per R203.

Similar Rules

Rule R621
R621       *Protect circuits with appropriate circuit breakers. Each branch circuit must be protected by 1 and only 1 circuit breaker or fuse on the PDP/PDH per Table 9‑3. No other electrical load can be connected to the breaker or fuse supplying this circuit.
Rule R622
R622       *Use appropriately sized wire. All circuits shall be wired with appropriately sized insulated copper wire (Signal Level cables don’t have to be copper):
Rule R618
R618       *Use PDP/PDH terminals as designed. Only 1 wire shall be connected to each terminal on the PDP/PDH.
Rule R625
R625       *Don’t modify critical power paths. Custom Circuits shall not directly alter the power pathways between the Robot battery, PDP/PDH, motor controllers, relays (per R503-B), motors and actuators (per R501), pneumatic solenoid valves, or other elements of the Robot control system (items explicitly mentioned in R701). Custom high impedance voltage monitoring or low impedance current monitoring circuitry connected to the Robot’s electrical system is acceptable, if the effect on the Robot outputs is inconsequential.