How to Define Technical Specifications for a Custom Data Center E-House

To define technical specifications for a custom data center E-House, start with the facility’s electrical load, redundancy strategy, site conditions, and required equipment interfaces. Then translate those inputs into measurable requirements for the enclosure, power distribution, thermal management, fire and life safety, monitoring, transport, and testing. We recommend documenting both the required values and the party responsible for supplying, installing, and verifying each item. A coordinated specification helps buyers compare proposals and reduces the risk of scope gaps during engineering and commissioning.

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Key Takeaways

• Define the data center’s operating and future load before selecting the E-House layout or electrical equipment.
• Specify interfaces, environmental conditions, redundancy, and acceptance requirements—not just a list of equipment.
• Mark assumptions and project-dependent values clearly so suppliers can identify gaps before quotation.
• Ask suppliers to provide a compliance matrix, interface drawings, and a documented inspection and test plan.

Step 1: Establish the Project Basis

Describe the facility and operating objective

Begin with a short design-basis document covering the site, project phase, intended function, and operating conditions. State whether the E-House will serve a new data center, an expansion, or a replacement project, and identify whether it houses medium-voltage, low-voltage, UPS, battery, or control equipment. The equipment lineup depends on the project architecture, so avoid assuming every E-House needs the same package. Include the required delivery boundary: for example, whether the supplier provides the enclosure only, a fitted electrical building, or an integrated package with defined interfaces.

Record load and redundancy requirements

Provide the present and planned electrical loads, voltage levels, frequency, fault-level information, and load growth assumptions where available. Identify the intended redundancy arrangement, such as N, N+1, or 2N, and explain which systems must remain available during maintenance or a component failure. These labels are not a substitute for a one-line diagram: the design team should clarify how redundancy applies to transformers, switchgear, UPS systems, cooling, and auxiliary supplies. If the design is not finalized, list the open decisions and request that suppliers state their assumptions separately.

Step 2: Specify the Enclosure and Site Conditions

Set environmental, structural, and transport inputs

Describe the installation location, including indoor or outdoor placement, ambient temperature range, humidity, altitude, wind, seismic conditions, exposure to dust or corrosive agents, and any flood or drainage considerations. Provide the applicable project and local code requirements rather than relying on a generic enclosure description. The required ingress protection, corrosion treatment, insulation, and HVAC arrangement depend on these conditions and on the equipment inside. Also confirm transport dimensions, lifting points, shipping restrictions, foundation details, and the route from delivery point to final position.

Ask for enclosure drawings that show external dimensions, internal clearances, access doors, cable entry zones, equipment maintenance space, and lifting provisions. Confirm whether the supplier or buyer is responsible for foundations, external cable trenches, field joints, and weather sealing after installation. If the E-House will be transported as a complete module, define the transport configuration and any site work needed before energization. These details help engineering teams check that a design that fits on paper can also be delivered, installed, and maintained.

Step 3: Define the Electrical and Mechanical Package

List equipment and performance requirements

Prepare an equipment schedule that identifies each major item, its rating, quantity, preferred manufacturer or acceptable alternatives, and required interfaces. For electrical equipment, specify the relevant voltage and current ratings, short-circuit withstand requirements, protection and metering functions, bus arrangement, cable termination details, and control power needs. For UPS and battery systems, define the required topology, autonomy basis, monitoring points, and any room separation or ventilation requirements. The values should come from the project’s electrical studies and design authority, not from an assumed standard package.

For HVAC, state the heat load or the method for calculating it, the required operating range, control philosophy, alarm points, and expected response to equipment or power failure. Specify whether cooling equipment is included in the supplier’s scope and how it connects to site services. Also identify fire detection and suppression requirements, emergency lighting, small power, earthing and bonding, and access control where applicable. Local regulations and the project fire strategy should govern the selected systems.

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Use measurable values, but label examples clearly

Every numerical requirement should identify its source, unit, tolerance where relevant, and verification method. For example, a hypothetical project brief might state a critical load of 1,200 kW, an equipment supply voltage of 400 V, and battery autonomy of 15 minutes. These figures are examples for illustrating specification format, not standard E-House requirements or Pushen design recommendations. Your actual values must be confirmed by the project engineer and coordinated with the equipment schedule, load calculations, and applicable codes.

Step 4: Define Interfaces and Acceptance Requirements

Clarify who supplies, connects, and verifies each system

Create an interface register covering electrical connections, communications, HVAC services, fire alarm signals, building management or monitoring systems, and civil works. For each interface, identify the responsible party, connection location, required protocol or signal type, and the document that will confirm the interface. Include battery limits for supply, installation, field cabling, and commissioning. This is especially important when multiple vendors provide switchgear, UPS, transformers, controls, or cooling equipment.

Specify the submittals required for review, such as general arrangement drawings, single-line diagrams, wiring diagrams, load lists, equipment datasheets, cable schedules, and installation instructions. Define inspection and test requirements at the appropriate project stage, including document review, factory inspection, and site commissioning responsibilities. A test should have a defined scope and acceptance criterion; avoid requesting a vague “fully tested” package without stating what is included. Confirm whether witness points, test records, and open-item closeout documents are required.

Step 5: Compare Supplier Proposals

Use a compliance matrix and a deviation list

Ask each bidder to respond against the same specification using a compliance matrix with columns for requirement, proposed response, compliance status, and supporting document. Require suppliers to list exclusions, deviations, assumptions, and buyer-supplied items explicitly. A low price may reflect a different scope, such as an enclosure without installed equipment, controls, or site support. Comparing proposals line by line makes these differences easier to identify before commercial evaluation.

Evaluate delivery and support as part of the technical offer

Request a preliminary project schedule with engineering, drawing review, procurement, fabrication, inspection, dispatch, and site-support milestones. Ask what information the supplier needs to release design and what changes may affect cost or lead time. Confirm warranty scope, spare-parts recommendations, documentation language, and the process for handling design changes. We at Pushen can review a project specification, identify information needed for a custom E-House proposal, and clarify the proposed supply boundary and technical interfaces.

Common Specification Mistakes to Avoid

• Specifying equipment without defining the operating scenario: State the required operating modes, maintenance conditions, and redundancy intent.
• Using “standard” without naming a standard or project requirement: Identify applicable codes, editions, and jurisdictional requirements for the project team to confirm.
• Leaving site conditions blank: Missing environmental, structural, or transport data can result in unsuitable assumptions or redesign.
• Ignoring interfaces: Assign responsibility for cabling, communications, fire signals, foundations, and field connections.
• Requesting tests without acceptance criteria: Define test scope, records, witness points, and the party responsible for approval.

Conclusion: Turn Design Inputs into a Reviewable Specification

The practical way to define technical specifications for a custom data center E-House is to document the load and redundancy basis, site and transport conditions, equipment package, interfaces, and verification requirements in one coordinated set of documents. Separate confirmed requirements from assumptions, and have the responsible engineering team validate values against project studies and local regulations. Before requesting a quotation, prepare an equipment schedule, interface register, preliminary layout, and supplier compliance matrix. Share these documents with Pushen to discuss the required scope, identify information gaps, and develop a proposal aligned with your project needs.

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