Quick Hits

Article 820 (1 of 1, So Far!)
Community Antenna Television and Radio Distribution Systems — Scope, Alternate Methods & Power Limits!

SLIDE 1 — Scope (820.1)
📺 WHAT DOES ARTICLE 820 COVER?
Coaxial cable distribution of radio frequency (RF) signals, typically used in CATV systems.
🔹 Closed-circuit TV
🔹 Cable television
🔹 Security TV cameras
🔹 Coaxial cable for radio and TV receiving equipment
📌 Network-powered broadband installations are covered in Article 830, not here.

SLIDE 2 — Alternate Wiring Methods (820.4)
🔀 NETWORK-POWERED BROADBAND SUBSTITUTION
Network-powered broadband wiring methods are PERMITTED to substitute for the wiring methods of Article 820.
💡 Why it matters: using network-powered broadband methods makes it easier to upgrade an existing Article 820 installation to network-powered broadband applications later.

SLIDE 3 — Power Limitations (820.15)
⚡ POWER OVER COAX
Coaxial cable can deliver power to equipment directly associated with the RF distribution system IF:
🔹 Voltage is NOT over 60 volts
🔹 Current comes from a transformer or other device with power-limiting characteristics
🚫 Power must be BLOCKED from premises devices on the network that are not intended to be powered via the coaxial cable.

SLIDE 4 — Final Exam
🧠 FINAL EXAM QUESTION FOR ARTICLE 820 (Part 1)
Q: Per 820.15, coaxial cable can deliver power to associated equipment if the voltage is not over what?
A) 24 volts
B) 48 volts
C) 60 volts
D) 120 volts
(Drop your final answer 👇)

Article 820 Part 1 = DONE ✅ More sections coming as you send them: grounding, outside/entering buildings, and listing requirements! ⚡
#JoshTheSparky #NEC2026 #ElectricianLife

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