Concepts

Cable group

Keypads, fire alarm devices, or speakers on a 70- or 100-volt line, that share one cable to one rack or panel — LINK-1, SLC-1, NAC-1, 70V-A.

A Cable group is icons that share one cable type to one rack or panel: keypads on a link (LINK-1), fire alarm devices on a loop (SLC-1) or a notification circuit (NAC-1), or speakers on a constant-voltage line (70V-A, or 100V-A for a 100-volt line).

A link, loop or circuit is membership only, with no order: the wiring order is decided on site. Its cables each have a Cable ID: the run to the rack or panel (LINK-1.1), a spare (LINK-1.2) — left disconnected on a link, the Class A return to the panel on a loop or circuit — and one cable between its members (LINK-1.3), estimated for buying. A new member joins the newest group of its kind at its rack or panel with room, else a new one.

A line is one zone: its speakers are wired as a chain from the speaker its cable enters, and each piece of the chain is its own cable with its own Cable ID. Connecting or disconnecting speakers is what moves them between lines.

Its limit is your company's rule, not the manufacturer's. Past it the group is marked in red. New group moves the members past the limit to new groups of up to the limit each; a line past its limit is split by splitting its zone. Nothing is refused.

Pointing at a group outlines its members.

Tasks: Group keypads on a link, wire fire alarm devices, build a 70V or 100V line.