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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 R618
R618       *Use PDP/PDP2.0/PDH terminals as designed. Only 1 wire shall be connected to each terminal on the PDP/PDP2.0/PDH.
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/PDP2.0/PDH 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 Kraken X60 Powerpole adapter board (WCP-1380, RF-4003).
Rule R619
R619       *Only use specified circuit breakers in PDP/PDP2.0/PDH. The only circuit breakers permitted for use in the PDP/PDP2.0/PDH are:
Rule R620
R620       *Only use specified fuses in PDP/PDP2.0/PDH. The only fuses permitted for use in the PDP/PDP2.0/PDH are automotive blade fuses with the following values:
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