A Main Lug Only (MLO) panel only has main lugs, and is intended to be fed by a Main breaker upstream. For example there can be Main breaker at the outdoor meter, or a MLO panel can be used as a sub panel,fed by a breaker in the Main panel.
What is a main lug only panel?
A Main Lug Only (MLO) panel only has main lugs, and is intended to be fed by a Main breaker upstream. For example there can be Main breaker at the outdoor meter, or a MLO panel can be used as a sub panel ,fed by a breaker in the Main panel.
How are the main lugs connected to the load center?
The incoming supply cables are connected directly to the main lugs and bus bars. Primary overload protection for the load center is not provided as an integral part of the load center. Main lug units are primarily used as a distribution panel where there is a main breaker upstream in the system.
How do you disconnect a main lug panel?
A main lug panel has the line wires going to lugs in the panel and no common breaker to disconnect the power to the individual breakers. In a main lug panel you need to use a separate Disconnect.
What does a main lug do?
Main lug units are primarily used as a distribution panel where there is a main breaker upstream in the system. There are situations where a back fed circuit breaker and a retainer clip (required by NEC®) are used to convert a main lug load center to a main breaker load center.
What does Main lug panel mean?
Main Lug Panels. Main lug panels do not have a main breaker. Instead, the line wires run to a type of electrical connector called a lug. This type of electrical panel requires a separate disconnect. In the event of a fire, the separate disconnect at a meter lets firefighters cut the power without entering the buidling.
Does a subpanel need a main breaker?
The subpanel may be equipped with a main breaker to allow for power interruption without having to go back to the main panel, but it is not required to have a main shutoff circuit breaker, since the feeder breaker back in the main panel serves this function.Mar 24, 2022
What is the difference between MLO and MCB panels?
You can actually use an MLO panelboard but unlike a MCB panelboard which contains as many circuit breakers as it can hold, the MLO panel is only allowed to contain two to six circuit breakers.Dec 8, 2021
What does Main lug convertible mean?
A Convertible Mains, means that the Main Breaker load centers can be converted to Main Lugs load centers OR a Main Lugs load center can be converted to a Main Breaker Load Center.Jul 3, 2003
Why is my breaker box outside?
Is Your Breaker Box on the Outside of Your House? Over the past 15 years, regulations have been introduced in certain parts of the country requiring breaker boxes to be located outside of the home. This is so that the local fire department can quickly shut off a home's electricity supply in the event of a fire.
Can I use a main lug panel as a subpanel?
The main circuit breaker provides a level of overcurrent protection for all branch circuits, as well as a single disconnect means for all loads being fed by the load center. Main lug only load centers are typically applied downstream of a main circuit breaker panel and are often referred to as a sub panel.
How do you feed a subpanel from the main panel?
2:493:58# 51 Feeding a sub panel complete instructions - YouTubeYouTubeStart of suggested clipEnd of suggested clipAnd that completes the riser installation of both the panel and the sub panel breaker doubt we'reMoreAnd that completes the riser installation of both the panel and the sub panel breaker doubt we're going to turn the main on. And turn the breakers on one at a time.
Does a subpanel need a separate ground rod?
Yes, any sub panel outside of the main building requires it's own ground rod and a ground wire back to the main building. And yes, a sub panel in the same building as the main does not need a ground rod - only the ground wire.Sep 27, 2017
What is a main distribution panel?
Main Distribution panels (also known as load centers, switch boards, and motor contol centers) are cabinets that house and separate subsidiary/branch circuits in addition to providing each circuit with protective fuses or circuit breakers.
What does MLO mean in electrical terms?
MLO = main lug only - wires land on lugs that connect directly to the panel bus. MCB = main circuit breaker - wires land on a breaker, the output of which supplies the panel bus.Sep 11, 2020
What is MLO electrical panel?
Main lug only panels are typically applied downstream of a main circuit breaker panel and are often referred to as secondary or add-on panels. For MLO panels, the incoming cables are terminated on line side lugs that are attached directly to the bus, no main overcurrent device exists in the panel.
What is a main lug unit?
Main lug units are primarily used as a distribution panel where there is a main breaker upstream in the system. There are situations where a back fed circuit breaker and a retainer clip (required by NEC®) are used to convert a main lug load center to a main breaker load center.
Does a load center have a breaker?
A main lug type load center does not have a main circuit breaker. The incoming supply cables are connected directly to the main lugs and bus bars. Primary overload protection for the load center is not provided as an integral part of the load center.
