MV/LV E House Enclosure Selection Guide: Design, Components, and Project Requirements

Select an MV/LV E House enclosure by starting with the electrical equipment and site conditions—not with a standard building size. Define the voltage and equipment lineup, access and maintenance needs, environmental exposure, transport limits, and applicable project requirements before confirming materials, layout, and options. The enclosure must protect and accommodate the equipment while supporting safe installation, operation, and maintenance.

View Details

In this guide, we explain how to scope an E House enclosure, compare common design choices, and prepare a supplier-ready specification. We also outline practical checks for evaluating suppliers, costs, minimum order quantities, and lead times without assuming that one design fits every project.

Who This Guide Is For

This guide is for project owners, EPC contractors, electrical engineers, procurement teams, and system integrators sourcing a prefabricated electrical building or enclosure. It is particularly useful when MV switchgear, LV switchgear, transformers, control equipment, or auxiliary systems must be housed together or delivered as part of a coordinated project package.

Requirements differ by site, equipment manufacturer, and governing project documents. Use this guide to organize decisions and supplier discussions; rely on the project engineer and relevant authorities to confirm electrical clearances, fire and life-safety provisions, and code compliance.

What an MV/LV E House Enclosure Does

An E House enclosure is a prefabricated structure designed to house electrical and associated equipment. Depending on the project scope, it may include the building shell, equipment support and mounting provisions, cable entry arrangements, doors, ventilation or air conditioning, lighting, and other specified accessories.

The enclosure is not a substitute for properly selected and coordinated electrical equipment. Its layout and interfaces must be developed around the equipment supplier’s drawings, operating requirements, cable routes, and maintenance procedures. A complete specification also identifies which items are supplied by the enclosure manufacturer and which remain within the scope of the switchgear or system integrator.

Types, Materials, and Design Options

Structural and enclosure materials

Steel construction is commonly considered where a project needs a robust, transportable structure, while other material choices may be suitable for particular weight, corrosion, or site constraints. The right choice depends on the required structural design, exposure, transportation method, and maintenance plan. Ask suppliers to state the proposed material, protective coating system, and any preparation or finishing included.

Corrosive atmospheres, coastal locations, dust, moisture, and outdoor exposure can influence material and finish selection. Do not assume that a particular material or coating is suitable based only on a product description. Specify the site conditions and ask how the proposed construction addresses them.

Environmental protection and services

Outdoor and indoor installations may require different enclosure features. Depending on the application, the design may include weather protection, controlled ventilation, cooling, heating, lighting, fire detection interfaces, or access-control provisions. These features should be defined from equipment needs and project requirements rather than added without a clear purpose.

An ingress-protection designation can be included as a project requirement where applicable. For example, IP54 may appear as an illustrative specification target, but it is not a universal recommendation for every E House. Confirm the required rating, the applicable standard, and the conditions under which any stated rating applies.

Match the Enclosure to the Application

For substations and utility projects, prioritize equipment arrangement, cable access, maintainability, site exposure, and coordination with the wider electrical installation. For industrial facilities, consider the production environment, shutdown access, and the effect of heat, dust, or corrosive substances on equipment and building services. For data center projects, examine redundancy requirements, equipment separation, monitoring interfaces, and the project’s specific operational criteria.

Transport and installation are equally important. Confirm overall dimensions, lifting points, shipping configuration, delivery route constraints, foundation interface, and on-site assembly requirements. A design that accommodates the equipment in a factory drawing may still need revision if it cannot be transported or installed as planned.

If you want to learn more, please visit our website Pushen.

Selection Framework: From Project Brief to Approved Design

1. Establish the electrical scope

List the equipment to be housed, including switchgear, control panels, protection and metering equipment, batteries, and auxiliary systems where relevant. Provide equipment dimensions, weights, heat dissipation information when available, cable-entry locations, and supplier drawings. Record the system voltage and frequency from the project design; for example, state whether the project uses 50 Hz or 60 Hz rather than leaving frequency implicit.

2. Define site and operating conditions

Document indoor or outdoor installation, ambient temperature range, humidity, altitude where relevant, dust, corrosion, wind, and other environmental exposures identified by the project team. If a preliminary brief uses an illustrative range such as -10°C to +40°C, label it as an initial assumption until the project engineer confirms the actual design conditions. The selected enclosure and any cooling or heating provisions must be checked against the equipment manufacturers’ requirements.

3. Develop the internal layout and access plan

Coordinate equipment positions, operating sides, door swings, escape routes, cable trenches or entry points, and maintenance access. Do not treat an example access dimension, such as 1,000 mm, as a universal clearance requirement; verify every dimension against equipment instructions, applicable regulations, and the approved project layout. Request a dimensioned general arrangement drawing for review before production.

4. Set interfaces and project deliverables

Identify foundation loads and interfaces, cable-entry details, earthing connections, ventilation openings, lifting provisions, and external connections. Agree which party supplies each item and who approves drawings. The specification should also describe the required documentation, inspection points, packing, transport responsibilities, and any site support included in the purchase scope.

5. Confirm compliance and acceptance criteria

Provide the standards, codes, owner specifications, and inspection requirements that apply to the project. Ask the supplier to identify how the proposed design addresses those requirements and to flag any exclusions or assumptions. Avoid relying on broad claims such as “compliant” without knowing the exact requirement, design scope, and evidence expected by the purchaser.

Pricing, MOQ, and Lead Time

E House enclosure pricing depends on factors such as dimensions, structural design, materials and finishes, environmental provisions, openings, internal fit-out, documentation, and transport arrangements. Customization can change both engineering effort and manufacturing scope, so quotations are more useful when based on a defined equipment list and interface package.

Minimum order quantities and lead times are supplier- and project-dependent. Request the expected schedule for design review, drawing approval, material procurement, fabrication, inspection, and dispatch separately. Confirm which events start the schedule and how late changes to dimensions or interfaces may affect cost and delivery.

Supplier Evaluation Checklist

• Scope clarity: Does the quotation clearly separate the enclosure, equipment, building services, and customer-supplied items?
• Engineering coordination: Can the supplier review equipment drawings, cable interfaces, layout, and transport constraints?
• Design evidence: Are drawings, material descriptions, finish details, and stated ratings available for review?
• Quality planning: Are inspection stages, acceptance criteria, and documentation identified before order placement?
• Commercial transparency: Are assumptions, exclusions, MOQ, schedule, packing, and delivery responsibilities stated?
• Project communication: Is there a clear process for technical queries, drawing comments, and change control?

Pushen can discuss MV/LV E House enclosure requirements as a manufacturer and supplier, including project-specific layout, material, and interface considerations. Share the equipment list, site conditions, target dimensions, applicable specifications, and delivery location so the scope can be reviewed. Confirm the exact product configuration, engineering deliverables, commercial terms, and schedule directly during quotation.

Common Selection Mistakes to Avoid

One frequent mistake is ordering an enclosure before obtaining current equipment dimensions and cable-interface information. Another is specifying environmental protection without describing the actual site exposure or checking the needs of the equipment inside. These gaps can lead to redesign, unclear responsibility, or features that do not address the project’s real operating conditions.

Buyers should also avoid treating preliminary dimensions, ratings, or schedules as approved requirements. Mark assumptions clearly, obtain engineering review, and control revisions to drawings and specifications. This approach helps align the enclosure design with both the electrical package and the construction plan.

Key Takeaways and Next Steps

The right MV/LV E House enclosure is the one engineered around the project’s equipment, environment, access needs, interfaces, transport route, and governing requirements. Material, protection rating, ventilation, and dimensions should be selected from documented conditions rather than copied from a generic specification. No single enclosure configuration is suitable for every MV/LV application.

To move forward, prepare an equipment schedule, site-condition brief, preliminary layout, required standards, and delivery constraints. Send these documents to prospective suppliers and request a scoped quotation, interface review, drawing package, and schedule assumptions. Pushen can use this information to discuss a project-specific enclosure solution and clarify the next steps for technical and commercial review.

For more information, please visit MV/LV E House Enclosure.