Empty electrical enclosure compared with a completed wired control panel

Electrical Enclosure vs Control Panel: What Our Quote Is Based On

Learn what an electrical enclosure quote is based on, what to provide for assembly, when FN can help with enclosure design, and which responsibilities need another owner.

Empty electrical enclosure compared with a completed wired control panel

What do you actually need delivered?

If you need a metal housing, ask for an enclosure. If you need cutouts, brackets, a mounting plate, or installed hardware, list them. If you need components wired and tested, say so.

Our position is simple: a product name is not a scope. The quotation must state what arrives and what remains with the buyer, panel builder, or system integrator.

DeliverableWhat arrivesUsually separate
Empty enclosureBody, door, gasket, lock, and listed accessoriesCutouts, components, wiring, and testing
Modified enclosureApproved openings, brackets, gland-plate work, hardware, and finishElectrical design and internal wiring
Mechanical assemblyAgreed mounting plate, rails, wire duct, brackets, or listed devicesWiring, programming, FAT, and commissioning unless quoted
Wired control panelOnly the components, wiring, tests, and documents listed in the contractAny unassigned electrical, software, site, or certification work
Four deliverable levels from empty enclosure to wired and tested control panel

What is our quote based on?

The quote is based on the work required to produce and deliver the agreed scope—not on height, width, and depth alone.

We need to knowBecause it changes
Size, mounting, doors, removable panels, plinth, lifting, and accessStructure, material use, fabrication, and packing
Carbon steel, stainless steel, or aluminum; thickness and finishMaterial cost, processing, corrosion strategy, and appearance
Cutouts, welded parts, brackets, windows, and custom hardwareProgramming, machining, welding, inspection, and rework risk
Mounting plate, rails, wire duct, accessories, and installed devicesPurchased parts, assembly time, and layout responsibility
Quantity, variants, prototype stage, and first-article approvalEngineering setup, repeatability, and production planning
Inspection records, drawings, labels, packaging, and delivery termsQuality work, documentation, packing, and logistics

“One 800 × 600 × 300 mm enclosure” is not enough for a firm price. A stainless-steel body, door-mounted HMI, side-wall cooling unit, twenty cable entries, welded brackets, and export packing turn the same outside dimensions into a different job.

A useful quote makes four things visible: included work, buyer-supplied items, temporary assumptions, and changes that require a new price.

Three quotations compared by enclosure, mechanical assembly, and wired control panel scope

No complete drawings? Send these five things

  • Application and installation environment
  • Available space or approximate enclosure size
  • Component list, model numbers, photos, or largest component dimensions
  • Required delivery scope: empty, modified, mechanically assembled, or wired
  • Prototype quantity and expected production quantity

This is enough to start a requirements review. It may not be enough for a firm price. If cable entry, heat load, cutouts, inspection, or packing details are still unknown, we will list them as open items instead of asking you to finish the whole design first.

Control panel RFQ scope matrix showing included, optional, excluded, and buyer-supplied items

Can FN help if you do not have drawings?

Yes. FN can help develop the enclosure mechanical design from photos, a rough sketch, a component list, an existing enclosure, or application requirements.

The agreed scope may cover the enclosure body, doors, mounting plate, brackets, cutouts, cable-entry provisions, cooling-equipment openings, and manufacturability review.

What you have nowWhat FN can do nowWhat must be confirmed later
Approved enclosure drawingsCheck manufacturability and prepare the quotationOpen manufacturing questions and the final controlled revision
Component list, but no layoutDevelop the body, doors, mounting plate, brackets, cutouts, and cable-entry provisionsExact component data, clearances, heat inputs, and approved layout
Photos, an old enclosure, or a rough sketchSet an initial envelope and identify missing mechanical inputsMeasured interfaces, environment, cable entry, and selected components
Only an applicationClarify the environment and delivery scope, then define the next data neededEnough information to create and approve a production drawing

A rough application can start a design review. It cannot release fabrication.

When is FN design support safe?

FN can help when the mechanical boundary is clear and the buyer has someone who can approve the final interfaces. Four controls matter.

  1. Define the object. State whether FN is designing the body, mounting plate, cutouts, brackets, cable entry, cooling provisions, or another agreed mechanical assembly.
  2. Name the input owner. Someone must confirm component data, environment, heat loss, cable schedule, and installation limits.
  3. Expose assumptions. A temporary HMI model, estimated heat load, or provisional cable count belongs in the quotation—not in an informal email thread.
  4. Control the release. A quotation drawing supports pricing. Fabrication starts only from the approved revision.

Enclosure design support does not automatically include electrical architecture, protection coordination, SCCR, electrical schematics, internal wiring, PLC/HMI software, FAT/SAT, site commissioning, or complete-system certification.

If the project also involves hazardous-area requirements, purge equipment, door interlocks, or FAT, list them separately and name the responsible design and test owner.

Environment comes before material and rating

Start with the installation, not a rating label. “IP66” or “stainless steel” does not tell us whether the enclosure faces rain, washdown, salt, chemicals, solar heat, condensation, or vibration.

Tell usIt affects
Indoor or outdoor locationWeather protection, drainage, sealing, finish, and accessories
Minimum and maximum ambient temperatureGasket, condensation, ventilation, and cooling decisions
Rain, dust, or washdownDoor, seam, cable entry, hardware, and installation details
Salt, humidity, or chemicalsMaterial, finish, fasteners, and corrosion strategy
Sun, altitude, vibration, or impactHeat load, reinforcement, mounting, and component support
Hazardous-area or market requirementSpecialist design, component, evidence, and approval responsibilities

An IP or NEMA target can be part of the specification. It cannot replace the environmental data that drives the design.

Environmental inputs affecting enclosure material, sealing, thermal design, and installation

If you need assembly, send more than a BOM

A BOM tells us what the parts are. It does not tell us where they go, who supplies them, or what “assembled” includes.

Requested workProvide
DIN rail and wire ductApproved layout, datums, dimensions, fixing method, and quantity
Door-mounted HMI, buttons, or disconnectExact model, cutout drawing, fixing pattern, orientation, seal, and rear clearance
Internal component mountingBOM, data sheets, spacing, supports, heat data, and maintenance clearance
Buyer-supplied componentsPacking list, arrival date, quantity, condition, and replacement rule
Cable entryCable count, diameters, entry zone, bending space, sealing method, and spare capacity
Internal wiring, if quotedApproved schematics, wire specification, terminal plan, labels, and test requirements

Mechanical assembly is not shorthand for a wired control panel. If you need wiring, labels, inspection, or testing, put each item on its own scope line.

Assembled backplate compared with a wired and tested control panel

Control panel drawings need a release status

“Drawing attached” is not enough. The title block should tell the factory what it may do.

StatusUse it for
Issued for quotationScope review, assumptions, and pricing—not fabrication
Issued for approvalChecking layout, interfaces, components, and clearances
Approved for fabricationCutting, drilling, welding, and agreed assembly
As-builtRecording the delivered configuration and approved changes

Change the HMI model after approval and the old door cutout may no longer fit. Change the cooling unit and both the wall opening and internal layout may move. The drawing revision and quotation assumptions must change together.

Controlled drawing revision path from quotation to fabrication and as-built files

Thermal and cable-entry data cannot wait

Cooling equipment and cable entries compete for the same wall area and internal space. Decide them before the enclosure layout is frozen.

For cooling provisions, send the component heat loss, ambient range, allowable internal temperature, solar exposure, and ventilation limits. For cable entry, send the cable count, diameter range, direction, bending space, sealing method, and spare capacity.

If those inputs arrive late, the gland plate, mounting plate, cooling opening, or complete enclosure may need to change.

Panel builder responsibilities are separate

FN can help develop the agreed enclosure body, doors, mounting plate, brackets, cutouts, cable-entry provisions, and cooling-equipment interfaces.

Electrical architecture, protection, schematics, component suitability, internal wiring, PLC/HMI software, FAT, commissioning, and complete-system certification need a named owner. That may be the buyer, OEM, electrical designer, panel builder, or system integrator.

Do not leave this boundary to interpretation. Mark every line as Included, Optional, Excluded, or Buyer-supplied.

Responsibility boundaries across the control panel project team

Use the guide that matches your next question

Custom Electrical Enclosures

For project-specific dimensions, materials, cutouts, brackets, and mechanical interfaces.

Applications Hub

For outdoor, washdown, corrosion, thermal, retrofit, and machine-integration projects.

Electrical Enclosure Sizing Guide

For component space, wiring room, door clearance, cooling space, and expansion.

Cutouts, Inserts, and Hardware Guide

For HMI, connector, fan, filter, lock, hinge, and mounting details.

Outdoor Electrical Enclosures

For rain, sun, condensation, drainage, and outdoor installation.

Stainless Steel Electrical Enclosures

For washdown, humidity, salt, and chemical exposure.

Send what you have

A photo, sketch, BOM, old drawing, or component list can start the conversation. Add the application, environment, available space, delivery scope, and quantity if you know them.

We will return the missing-input list and proposed next step. A firm quotation follows when price-changing assumptions are closed. Fabrication follows only from approved drawings.Send Your Enclosure RequirementsDownload the RFQ Scope Matrix

Frequently asked questions

Can FN help if I only have photos or a rough sketch?

Yes. We can use them to clarify the application, set an initial enclosure envelope, and list the missing mechanical inputs. Exact interfaces still need approval before fabrication.

Do I need to complete the RFQ matrix before contacting FN?

No. Use it to organize known information or compare bidders. If fields are blank, send what you have and we will identify which missing items affect the enclosure, price, or production release.

What is required for a firm quote?

A firm quote needs the deliverable, environment, material and finish, component interfaces, modifications, assembly scope, quantity, inspection, documents, packing, and delivery terms. Any remaining price driver must be closed or written as a quotation condition.

Does component mounting include wiring?

No. Mounting and wiring are separate scope lines. Wiring also needs approved schematics, terminals, labels, wire specifications, and test requirements.

Can provisional component data be used?

It can support a concept or conditional quote. Before fabrication, freeze every model that controls a cutout, mounting pattern, clearance, cable interface, or heat input.