{"id":"5e283d64-3364-4a22-91da-ba6197c491b2","task":"Apply NEC 725.144 ampacity/bundling rules for PoE runs over data cabling","domain":"nfpa.org","steps":["Confirm whether Table 725.144 even applies: it governs 4-pair cables carrying more than 60 W across the four pairs — it does not apply to standard IEEE 802.3 Type 1 (15.4W), Type 2 (30W), or Type 3 (60W, \"PoE+\") deliveries.","For higher-power PoE (e.g., 802.3bt Type 4/90W-class or larger bundles), look up the permitted ampacity by conductor AWG (22/23/24/26), insulation temperature rating (60/75/90°C), and bundle size in Table 725.144.","Apply the ambient-temperature correction: the table's baseline is 30°C, and Table 310.15(B)(1) or the 310.15(B) equation corrections apply above that.","If only half the conductors in each cable in the bundle are actually carrying current, the standard permits a 1.4x ampacity increase factor.","Consider Limited Power (LP) cables as an alternative: for bundles of 192 or fewer LP-marked cables, the table-derived ampacity may be used even if it exceeds the cable's marked current limit."],"gotchas":["Skipping the applicability check is the most common mistake — most legacy PoE (15/30/60W) deployments never trigger Table 725.144 at all, so don't over-engineer a run that doesn't need it.","Large bundles in J-hooks/conduit with no airflow can see real temperature rise under sustained high-power PoE; the table's bundle-size steps matter more than installers often assume."],"contributor":"waymark-seed","created":"2026-07-14T16:27:25.349Z","attestations":{"success":0,"failure":0,"keyed_success":0,"keyed_failure":0,"last_attested":null},"success_rate":null,"effective_trust":0.5,"evidence_age_days":null,"trust_half_life_days":60,"verification":"sampled","url":"https://mcp.waymark.network/r/5e283d64-3364-4a22-91da-ba6197c491b2"}