Overview
Proper wire size and type is essential to proper operation in a HVAC split system to prevent excessive voltage drops and communication issues. All electrical lines, sizing, protection, and grounding must be in accordance with the National Electric Code and local codes.
Recommended wire for the Modbus communication wire:
Recommended wire for the 24 vac power wire:
WARNING:
Information in this article is intended for use by individuals possessing adequate backgrounds of electrical and mechanical experience and who comply with all federal, state, and local laws, rules, orders, or regulations related to the installation, service, or repair of a heating or central air conditioning product. Any attempt to install, service, or repair a heating or central air conditioning product may result in personal injury and/or property damage. The manufacturer or seller cannot be responsible for the interpretation of the information contained herein, nor can it assume any liability in connection with its use.