Junction Boxes (MS & GI Coated)
MS and GI-coated junction boxes house electrical terminations and wiring connections. TPE reviews the enclosure drawing, cable entries and terminal arrangement, with empty-box or fitted-assembly scope agreed in the quotation.
Product-type reference. The supplied make and configuration are confirmed in your quotation.
MS and GI junction boxes: define the assembly you are buying
Tirupati Power Enterprises supplies electrical goods and manufactures custom panels and accessories in Kolkata. For MS and GI-coated junction boxes, send your enclosure drawing, terminal schedule and quantities. Our team confirms the proposed construction, included fittings and commercial terms against the requirement.
An empty junction box and a fitted terminal assembly are different purchases. Choose the supply scope first. Then check whether your specified enclosure has enough usable space for the wiring, cable entries and maintenance access.
| Requirement | What to define | Confirm in the quotation |
|---|---|---|
| Empty MS enclosure | Dimensions, sheet thickness, lid, mounting and specified finish. | Enclosure construction, internal mounting provisions and included hardware. |
| GI-coated enclosure | Base construction, coating description and exposure conditions. | What GI-coated means for the proposed article; finishing and entry details. |
| Fitted terminal / junction box | Terminal type/count, conductor sizes, DIN rails and internal layout. | Exact terminals, glands, labels, earthing provisions and assembly scope. |
| Drawing-specific box | Entry positions, gland plates, mounting centres and drawing revision. | Approved fabrication drawing and the documentation required for the finished configuration. |
Junction box dimensions, entries and terminal schedule
State width × height × depth in millimetres and identify whether the dimensions are external or usable internal dimensions. A lid overlap, mounting plate or terminal rail can reduce the usable space. Include mounting centres when replacing an existing box, and identify cable entry faces on the drawing.
Cable count alone does not define the terminal arrangement. Identify conductor sizes, terminal type, number of ways and spare capacity. Entry thread, cable gland selection and cable bending space need to match the actual cables. Supply a wiring schedule or drawing rather than expecting the outside box size to settle these details.
| Field | What to send | What it resolves |
|---|---|---|
| Enclosure size | W × H × D in mm; external/internal basis; sheet thickness. | Space available for the intended components and wiring. |
| Material and coating | MS / GI-coated requirement; specified finish and service environment. | Fabrication and corrosion-protection scope. |
| Lid and mounting | Screw or hinged lid, gasket, mounting plate, brackets and centres. | Access, fixing and maintenance requirements. |
| Entries and glands | Entry face, quantity, thread/hole sizes, gland plate and unused entries. | A complete entry arrangement rather than an enclosure with unspecified holes. |
| Internal assembly | Terminal schedule, conductor sizes, rails, labels and earthing provisions. | Empty-box versus fitted-assembly price and space requirements. |
| Protection and records | Required IP/impact classification, drawing revision and evidence scope. | What must be supported for the proposed enclosure and completed assembly. |
IP54, IP55, IP65, IP66 and IP67: check the required protection
IEC 60529 classifies enclosure protection against access, solid objects and water. The brief comparison below explains commonly specified IP codes; it does not assign a rating to TPE boxes. Request documentation for the exact proposed enclosure, entries and fitted configuration.
| Code | Dust / solid protection summary | Water protection summary |
|---|---|---|
| IP54 | Dust-protected; dust entry is limited rather than fully prevented. | Protection against splashing water under the standard test conditions. |
| IP55 | Dust-protected; dust entry is limited rather than fully prevented. | Protection against water jets under the standard test conditions. |
| IP65 | Dust-tight. | Protection against water jets under the standard test conditions. |
| IP66 | Dust-tight. | Protection against powerful water jets under the standard test conditions. |
| IP67 | Dust-tight. | Protection against temporary immersion under specified test conditions. |
Check the complete enclosure, not just the metal box
Cable glands, stopping plugs, lid seals and entry plates form part of the enclosure system. A rating for an empty enclosure should not be transferred automatically to a modified or assembled box. Confirm how the required protection is maintained with the proposed entries and fittings.
Outdoor duty also involves corrosion, sunlight, temperature and condensation. IP classification alone does not settle those requirements.
Hazardous-area and flameproof requirements need the appropriate protection concept, equipment selection and documentation for the installation. An ordinary MS or GI box must not be treated as a certified hazardous-area enclosure. Identify that requirement at the enquiry stage so it is reviewed separately.
If the drawing specifies stainless steel, aluminium or a non-metallic box
The range described on this page is MS and GI-coated construction. Stainless steel, aluminium, ABS, polycarbonate and FRP/SMC identify different enclosure requirements. Send the exact material and product reference for a separate sourcing review rather than treating the same outside dimensions as an equivalent.
For stainless steel, identify the grade and finish. For aluminium or die-cast boxes, check the series, entry threads and mounting geometry. For ABS, polycarbonate or FRP/SMC, request the product-specific temperature, UV, impact and environmental information needed for the application. These details belong to the selected enclosure datasheet; the generic material name cannot establish a rating.
What changes junction box price and delivery?
Compare the same dimensions, material, thickness, finish, lid and mounting arrangement. A fitted box also depends on terminal make/type, terminal count, cable glands, internal hardware, labelling and any agreed inspection records. An empty-box rate is not a useful comparison with a wired assembly.
State quantity per drawing and delivery PIN code. MOQ, availability, manufacturing or sourcing lead time, packing, taxes and freight are confirmed in the quotation. Include the required documentation in the first enquiry so the commercial scope can be reviewed together with the construction.
Replacement example: why outside dimensions are not enough
Suppose two replacement boxes have the same external dimensions. One has a different gland-plate position, closer terminal spacing or a deeper mounting plate. It may not accept the existing cables or fix to the original mounting centres. A photograph of the closed lid would not reveal the mismatch.
For a replacement enquiry, attach an isolated, safely obtained reference photograph and the dimensional/entry drawing or existing part reference. Specify whether internal fittings are to be retained or replaced. Our team can then review the required supply rather than quote only an apparently similar outer box.
- Match usable space, mounting centres and entry positions to the drawing.
- Check the terminal/gland schedule and whether the box is empty or fitted.
- Confirm material, finish, lid arrangement and protection documentation.
- Identify approved deviations, quantity, delivery and quotation exclusions.
Make your enquiry ready to price
Record dimensions, terminals, cable entries, finish, protection requirements and quantities against each drawing.
Download junction box RFQ sheet (CSV)Fill the sheet and attach it to your enquiry. Your own BOQ or drawing is equally useful.
Check the commercial scope
Ask the quotation to identify the proposed construction or make, quantities and units, availability, price, taxes, freight and lead time. Review exclusions and any alternatives before placing the order.
Matching products and further guidance
Technical references and scope
Buying guidance prepared for Tirupati Power Enterprises. Primary references checked on . Use the selected product documentation and the agreed project specification for the actual order.
- IEC 60529 — enclosure IP classification ↗
- Rittal — technical aspects of enclosures, IP protection (printed pages 63–64) ↗
- IEC 62208:2023 — scope of empty enclosures for LV assemblies ↗
- Rittal — cable-entry protection depends on the specified entry components ↗
- Schneider Electric — why immersion and water-jet IP ratings are separate ↗
These references explain selection and specification. They do not establish TPE stock, brand authorisation or certification of a proposed product.
Other junction box and enclosure requirements
Choose MS, GI or a non-metallic junction box
This page covers MS and GI metal junction box requirements. For a plastic or transparent enclosure, use the ABS junction box range below. For a distribution box or networking enclosure, follow the matching range so your enquiry reaches the right product type.
What to send for a replacement junction box
Send the existing part reference or a drawing with width, height, depth, mounting centres and cable-entry positions. Include the terminal and gland schedule if the replacement must be fitted. State which internal parts will be reused. This helps us compare the usable space and fittings, as well as the outside dimensions.
Add the quantity per drawing, required date and delivery PIN code. Our Kolkata team confirms the proposed material, finish, included fittings, availability and delivery terms in the quotation.
Related junction boxes and electrical enclosures
Electrical boxes and enclosures
ABS & Transparent Junction Boxes
Work with our Kolkata team
Electrical procurement since 1991. Custom electrical panel and accessory manufacturing.
9 Pollock Street, 1st Floor, Suite B16, Kolkata - 700001
Customer visits: Monday–Saturday, 10:00–18:30. Sunday closed.
Panel and accessories works: 31A, Pulin Khatick Road, Kolkata – 700015.
GST: 19AESPK5930K1ZU · UDYAM-WB-10-0015130
Before you request a quotation
What should I check before selecting metal enclosures & control boxes?
An empty box and a completed wired control assembly are different scopes. Confirm fabrication, earthing and installed protection requirements separately.
What information is needed to quote metal enclosures & control boxes?
Provide MS/GI/stainless steel material and thickness; dimensions, door, mounting plate and entries; coating, corrosion and required protection; terminal/assembly scope and drawings. Include the quantity, requested make or existing reference and delivery PIN code.
Relevant products and guidance
Need this for your application?
Attach the enclosure drawing or completed RFQ sheet. Include dimensions, material, finish, terminal and entry details, quantity and delivery PIN code.