8 Way MCB Box: Medium Capacity DB Enclosure

If you are looking for dependable distribution that allows up to 8 MCBs, the I-closure 8 Way MCB Box is designed to meet the needs of electrical contractors and electricians with a compact design, proper protection, and ease of installation. The physical dimensions of the I-closure 8 Way MCB Box are 245 mm wide by 145 mm tall by 75mm deep which makes this style of medium (8) way enclosure fall between the smaller (4) way size and larger (12) way size enclosures. So why select an (8) way configuration? Additionally, what defines our DB enclosure as being suitable for your electrical distribution projects?

MCB Quantity Load Planning for 8-Way Systems

Eight MCB slots are optimal for med-to-large electrical distribution throughout medium-sized electrical installations as they give ample space for circuits to be wired separately while not infringing on the need for larger panels. Most commercial and small businesses (such as retailers or small office space) along with residential add-ons only require 6–8 dedicated circuit breakers. Our eight way MCB box is designed to accommodate basic load size forecasts: Home’s main source of electricity (with 7 sub-circuits being fed from it) Dedicated lighting / power separation (this can be achieved generally at the same time as providing adequate lighting) Separating the electricity source to be used for both emergency use and regular use) Distributing the circuits within each individual room or area being supplied from the main electricity source At 245mm width allows for traditional mounting of 35mm perforated channel (DIN Rail) FT mounted flush against any wall and thereby retains the functionality and support provided by both structural and electrical equipment in any room requiring limited amounts of spare space but has a majority of electrical functionality.

8-Way DIN Rail Configuration Details

Standard 35mm DIN rail runs the full interior width of our enclosure. The rail positioning allows proper MCB spacing with adequate finger clearance for operation and maintenance. No cramped installations here.

Each MCB position receives dedicated labeling space below the rail. White label strips accept permanent marker or adhesive labels. Clear circuit identification prevents confusion during maintenance or emergency shutdown.

Wire entry flexibility comes from pre-formed knockouts at top, bottom, and sides. Choose your cable entry points based on conduit runs and installation requirements. Most contractors prefer top entry for wall-mounted units.

Medium Panel Space Optimization

Only 145mm tall, this enclosure is compact but provides all the internal space required for all electrical components to function. Space will be needed for proper finger access when operating MCB handles – our design ensures adequate separation so fingers can comfortably operate handle & not hit the enclosure or MCB adjacent to them. As these boxes have a medium capacity, good internal wire management will also be important. With an internal depth of 65mm, the bending radiused within the enclosure for conductors that are 2.5 mm and 4mm cannot exceed recommended limits. Neutral and earth bars must be fitted securely and will not interfere with the MCB area. The installation depth of 75mm allows for installation in all standard electrical box recess depths. For surface mounting purposes, flanges have been included on these enclosures which need to be used in conjunction with appropriate wall plugs. Enclosure weight provides for easy one-person installation on all wall types.

Branch Circuit Protection Sizing

The eight-way capacity is well-suited for small commercial and large residential applications. Examples of standard circuit configurations are: 1) A dedicated main disconnect switch rated either 63A or 100A. 2) Two circuits for lighting, each with its own circuit breaker (MCB), rated from 10A to 16A. 3) Two circuits for power outlets, each with its own MCB, rated from 16A to 20A. 4) One circuit for heavy duty appliances, with a dedicated MCB rated between 25A to 32A. 5) The last two circuits can be reserved for future expansion and can have MCBs rated based upon downstream loads required and wire gauges utilized. Note that the enclosure is designed to accept a complete range of MCB sizes, from 6A single pole up to 63A double pole. Confirm specifications from MCB manufacturers to ensure fit before purchase. Earth and neutral bars run parallel to the DIN rail, providing sufficient terminal capacity for incoming feeds, circuit power connections and reducing wiring errors by not color coding the terminals of the circuit feeds.

Contractor Installation Workflows

The procedure for efficiently installing begins with careful planning of the installation. Mark the location of where which wall you would like to install before opening your enclosure packaging. The mounting template (available from IDIS India) will provide accurate hole placements where the wall plugs are to be positioned. The sequence of the installation for a professional result is:

1. Securely position and fasten the enclosure to the wall with empty box 2. Install the DIN rail along with all mounting hardware onto the enclosure 3. Install the Neutral and Earth Floor Bars in accordance with the project plans 4. Run the incoming supply cables to the enclosure 5. Install the MCB’s in their design locations 6. Complete the internal wiring connections to all of the various busbars 7. Affix circuit labels appropriate to all of the circuits requiring closure.

Cable Entry Preparation will be complete prior to the final positioning. All appropriate knockouts or grommets should be removed and wall ties should be installed to protect the painted surfaces from damage during the installation of the product and turn on the power to the product. The Enclosure Hinged Door will allow full access for wiring and the Internal Dimensions of the Enclosure should Allow reasonable working space for all Standard Electrical Tools. Most contractors will complete the wiring without dismounting the enclosure from its mounting position.

Multi-Circuit Labeling Systems

Because of having eight individual MCB positions, clear identification of circuit is required. Each breaker position has an area on our enclosure to place labels. The standard electrical label will fit into the designated area. Here are some examples of how we can apply labels for identification of the circuits: Room identification e.g. Kitchen, Office, Workshop; Type of load e.g.; Lighting, Power, Equipment; Specific load e.g.; Air Conditioning, Computers or General use; Emergency classifications e.g.; Critical and Non-Critical; A permanent marker will write on the white strip of the labels but applying adhesive labels has a neater look and makes it easier to change any of the information. Many contractors prefer laminated labels for their long life in the industrial environment. Internal circuit schedules can also be placed on the inside of the enclosure door to provide a complete record of the installation that can be referenced during the maintenance process. The internal schedules are to contain MCB ratings, descriptions of the circuit and maximum used for each position.

Technical Specifications

Looking for exact pricing and current availability? IDIS India provides detailed quotations based on quantity requirements and material specifications. MOQ details vary depending on customization needs and delivery timelines.

Contact our team for specific project requirements. Well help you determine the right configuration for your electrical distribution needs.

Need Help Choosing the Right Enclosure? Get in Touch!