What wire size do I need to connect the outdoor and indoor units?.See our full guide to Wire Sizes to determine the gauge for your unit. The wire size is determined by the power draw of the mini split, the distance, and local electrical codes. What wire size do I need from the circuit breaker to the disconnect?.The second type of wire is the one that goes from the outdoor unit to the indoor unit. The first is the wire from the circuit breaker to the disconnect. There are two kinds of wires used by mini split systems: How many wires are needed for a mini split?.Select the fuse based on the maximum overcurrent protection amp rating of your system.īefore wiring a mini split system, let’s go over critical factors you need to consider when wiring a mini split wiring. The package comes with two fuses of your choice. The knockouts are located on the side, back, and bottom and allow for 1/2″, 3/4″, or 1″ connections. It also features easy to read indicator lights for blown fuses. The terminals are arranged for simple hookup with heavy duty wiring, and the door is reversible to make it easy to fit into any area. The included fuses install into the pull out handle. The Diversitech DDS-30 is designed to be easy to install and use. Quick Disconnect Switch Kit for Mini Split Air Conditioner Systems A disconnect switch is required by code in most places for all mini split installations.įeatured disconnect switch for mini splits: Disconnects are housed in a weatherproof enclosure so that they are safe to be outside. This device allows you to cut off power to the unit which can be useful when servicing the unit or in the event of an emergency. This prevents it from overloading and tripping other circuit breakers in the electrical box.Ī disconnect switch or service disconnect must be installed at the location of the unit outside. A dedicated circuit is one that has its own circuit breaker. According to the National Electrical Code, major appliances including ductless mini splits should have their own dedicated circuit. Mini splits must also have their own dedicated circuit to prevent overloading and repeated tripping of the breaker. Many single-zone mini splits come in 110v or 208/240v versions, while larger systems with a capacity over 12,000 BTUs typically operate on 208/240v. Ductless mini split systems generally require 208/240v, but some smaller mini split models only require 110v. The first thing to note is the voltage of your mini split. Always check the installation manual for the specific system you are installing as requirements can vary from item to item. NOTE: These instructions are in regards to electrical specifications only, and do not include line set installation or refrigerant set-up. Here, we offer a step-by-step guide to everything you need to know about the electrical specifications for installing ductless mini splits. Unless you are an advanced DIYer with extensive experience in electrical work, we strongly advise you to hire a professional to get the job done.īut even professionals have to learn the ropes, and so if you are an electrician who simply has not undertaken a mini split installation project before, this post is for you. As such, we don’t recommend homeowners try to install the unit themselves. Installing ductless mini splits requires a high level of electrical knowledge for the job to be done safely and without harm to yourself or the unit. Mini split air conditioners are a leading seller on our website, and, on our blog, have previously written about all the benefits of and features to consider when purchasing a mini-split AC of your own. Ductless mini splits are one of the most popular AC choices for homeowners and businesses alike.
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