Detailed diagrams, cable guidance and step-by-step instructions for Australian installations.

15 Common Intercom Wiring Mistakes

Avoid intercom wiring mistakes involving 2-wire systems, IP systems, locks, relays and monitors.

Common mistakes

  1. 1Confusing IP and 2-wire topology: document the issue, correct the design and update the as-built notes.
  2. 2Forgetting separate lock power: document the issue, correct the design and update the as-built notes.
  3. 3Wrong relay output: document the issue, correct the design and update the as-built notes.
  4. 4No exit button plan: document the issue, correct the design and update the as-built notes.
  5. 5No app/network check: document the issue, correct the design and update the as-built notes.
  6. 6Poor monitor addressing: document the issue, correct the design and update the as-built notes.
  7. 7No lock timing test: document the issue, correct the design and update the as-built notes.
  8. 8No gate input confirmation: document the issue, correct the design and update the as-built notes.

How to avoid them

  • Start with a system design guide.
  • Use a cable or device schedule template.
  • Use the relevant calculator before choosing hardware.
  • Check the exact manufacturer manual before termination.
  • Update the as-built drawing after commissioning.

Useful next step

Use the diagram selector or search to find the correct diagram for the system you are planning.

Still stuck?

Use the next resource to turn this page into a practical plan, worksheet or quote brief.