Aria-130 Digital Key Telephone System
Issue: 1.2
Installation Manual
55
3.3.4 KSU Grounding
Before connection to the mains supply, the Aria-130 system must have a hard-wired protective
earth installed by a qualified person. The protective earth is required for user safety and also to
minimise EMC interference.
This is a mandatory requirement to satisfy ACA compliance.
A separate cable should be used between the ground source and the KSU, UL 1015 AWG #18 or larger
copper wire is recommended. The wire should be kept as short as possible, it is recommended that the
wire be no longer than 1 meter (about 3.28 feet).
Connecting Wire:
1. UL 1015 AWG#18 or larger than this.
2. Length ≤ 1 meter * The shorter the length of wire is, the better it is.
3. Color : Green / Yellow
Figure 3.3.9 The Connection Method of Earth Cable between KSU, External PFTU
