Stainless steel junction boxes
A stainless steel junction box is a small sealed enclosure for splices, terminal blocks and a few devices where cables meet. Our junction box sizes are the 9 smallest wall-mount enclosures, 6 × 4 × 4 in to 12 × 10 × 8 in outside, each in 304 and 316L stainless: a hinged door on a continuous gasket with a keyed quarter-turn latch, a removable mounting panel and wall-mount feet, rated NEMA 4X / IP66 by the manufacturer and not UL listed. The table gives each size's panel, DIN capacity and depth.
- Sizes
- 9 sizes, 6 × 4 × 4 in to 12 × 10 × 8 in (outside H × W × D)
- Grades
- Each in 304 and 316L stainless, #4 brushed
- Sheet
- 1.2 mm (18 ga)
- Door
- Continuous hinge, continuous gasket; quarter-turn latch with key
- Inside
- Removable galvanized mounting panel on welded studs; ground studs on body and door
- DIN capacity
- Up to 14 modules with wiring room (8 × 6 × 4 in, 8 × 8 × 4 in, 10 × 8 × 4 in, 10 × 8 × 6 in, 12 × 10 × 6 in, 12 × 12 × 6 in, 12 × 10 × 8 in); the smaller panels take terminals or modules edge to edge
- Cable entry
- Glands, conduit hubs and connectors where you want them: cutout designer
- Rating
- NEMA 4X / IP66 by the manufacturer; not UL listed
- Delivery
- Made to order, delivered in 10 business days
Size by size
Panel, DIN rail, depth and gland face
| Outside H × W × D | Inside (nominal) | Mounting panel | DIN rail, 17.5 mm modules | Panel to door | Bottom face for glands | Heat shed, sealed, 10 K | Shop |
|---|---|---|---|---|---|---|---|
| 6 × 4 × 4 in | 5.91 × 3.91 × 3.91 in | 114.4 × 63.6 mm | 2 modules, tight | 84 mm | 101.6 × 101.6 mm | ≈ 2 W | 304 · 316L |
| 6 × 6 × 4 in | 5.91 × 5.91 × 3.91 in | 114.4 × 114.4 mm | 5 modules, tight | 84 mm | 152.4 × 101.6 mm | ≈ 3 W | 304 · 316L |
| 8 × 6 × 4 in | 7.91 × 5.91 × 3.91 in | 165.2 × 114.4 mm | 5 modules | 84 mm | 152.4 × 101.6 mm | ≈ 4 W | 304 · 316L |
| 8 × 8 × 4 in | 7.91 × 7.91 × 3.91 in | 165.2 × 165.2 mm | 8 modules | 84 mm | 203.2 × 101.6 mm | ≈ 5 W | 304 · 316L |
| 10 × 8 × 4 in | 9.91 × 7.91 × 3.91 in | 216 × 165.2 mm | 8 modules | 84 mm | 203.2 × 101.6 mm | ≈ 5 W | 304 · 316L |
| 10 × 8 × 6 in | 9.91 × 7.91 × 5.91 in | 216 × 165.2 mm | 8 modules | 135 mm | 203.2 × 152.4 mm | ≈ 7 W | 304 · 316L |
| 12 × 10 × 6 in | 11.91 × 9.91 × 5.91 in | 266.8 × 216 mm | 11 modules | 135 mm | 254 × 152.4 mm | ≈ 9 W | 304 · 316L |
| 12 × 12 × 6 in | 11.91 × 11.91 × 5.91 in | 266.8 × 266.8 mm | 14 modules | 135 mm | 304.8 × 152.4 mm | ≈ 10 W | 304 · 316L |
| 12 × 10 × 8 in | 11.91 × 9.91 × 7.91 in | 266.8 × 216 mm | 11 modules | 186 mm | 254 × 203.2 mm | ≈ 11 W | 304 · 316L |
DIN capacity: 17.5 mm modules (DIN 43880, 90 mm tall) on 35 mm rails with 10 mm wiring room above and below each row and wire duct where it fits, the same layout rule as the product pages; "tight" = edge to edge with no wiring room. Heat: sealed, wall-mounted, 10 K above ambient (IEC/TR 60890 surface, k = 3.7 W/m²K). Planning aids, not a guarantee.
304 stainless wall-mount enclosure
6 × 4 × 4 in
2 DIN, tight84 mm usable2 W
316L stainless wall-mount enclosure
6 × 4 × 4 in
2 DIN, tight84 mm usable2 W
304 stainless wall-mount enclosure
6 × 6 × 4 in
5 DIN, tight84 mm usable3 W
316L stainless wall-mount enclosure
6 × 6 × 4 in
5 DIN, tight84 mm usable3 W
304 stainless wall-mount enclosure
8 × 6 × 4 in
5 DIN84 mm usable4 W
316L stainless wall-mount enclosure
8 × 6 × 4 in
5 DIN84 mm usable4 W
304 stainless wall-mount enclosure
8 × 8 × 4 in
8 DIN84 mm usable5 W
316L stainless wall-mount enclosure
8 × 8 × 4 in
8 DIN84 mm usable5 W
304 stainless wall-mount enclosure
10 × 8 × 4 in
8 DIN84 mm usable5 W
316L stainless wall-mount enclosure
10 × 8 × 4 in
8 DIN84 mm usable5 W
304 stainless wall-mount enclosure
10 × 8 × 6 in
8 DIN135 mm usable7 W
316L stainless wall-mount enclosure
10 × 8 × 6 in
8 DIN135 mm usable7 W
304 stainless wall-mount enclosure
12 × 10 × 6 in
11 DIN135 mm usable9 W
316L stainless wall-mount enclosure
12 × 10 × 6 in
11 DIN135 mm usable9 W
304 stainless wall-mount enclosure
12 × 12 × 6 in
14 DIN135 mm usable10 W
316L stainless wall-mount enclosure
12 × 12 × 6 in
14 DIN135 mm usable10 W
304 stainless wall-mount enclosure
12 × 10 × 8 in
11 DIN186 mm usable11 W
316L stainless wall-mount enclosure
12 × 10 × 8 in
11 DIN186 mm usable11 W
Junction box or pull box?
Splices and terminals, or a pull point
Junction box
Holds splices, terminal blocks and a few devices where cable runs meet. Size it for what is inside: the terminals or DIN modules, the bend room for the conductors and about 20% spare. Sizing an enclosure.
Pull box
A pull point in a conduit run. For conductors of 4 AWG and larger, NEC 314.28 sets its minimum size from the raceway trade size: for a straight pull, at least eight times the largest raceway; for an angle or U pull, six times. Check the edition your inspector enforces; any size you need is a custom build.
Guide
Cutouts, glands & HMI windows
Knockout and gland hole sizes, 22 and 30 mm operators, HMI cutout tolerances and panel thickness, windows, and what to send for a quote.
Read the guideGuide
Backplate and DIN rail layout
Mounting panel, DIN rail profiles, wire duct fill, device clearances, heat zones, cable separation, door devices and service space.
Read the guideGuide
Sizing an enclosure
Component envelope, mounting panel, spare space, wire bending room, depth, heat and door clearance, with a worked example and CAD.
Read the guideGuide
Grounding and bonding
Ground studs and bus bar, bonding the mounting panel and door, paint removal, DIN rails, neutral rules and NEC Article 250 pointers.
Read the guideNot a standard size?
Your size, material and cutouts, delivered in 10 business days.
Set width, height and depth, the material and the NEMA type in the enclosure builder, or send your drawing. From one piece, anywhere in the world. Counted from your order; for custom work, from your approval of the drawing.
Asked and answered
Stainless junction boxes: questions
What size stainless junction box do I need?
Count what goes inside: terminal blocks or DIN modules, the devices and their depth, and leave about 20% spare. The table gives each size's mounting panel, DIN capacity and depth to the door; each product page also lays your own modules out on its panel.
Do the junction boxes come with cable entries?
Add the entries you need in the cutout designer: it places cable glands, conduit hubs and connectors on any face, checks the spacing and sends the layout for a quote. Bottom entry is our recommendation outdoors and in washdown.
Will DIN rail terminals fit?
With wiring room and duct, the 8 × 6 × 4 in, 8 × 8 × 4 in, 10 × 8 × 4 in, 10 × 8 × 6 in, 12 × 10 × 6 in, 12 × 12 × 6 in, 12 × 10 × 8 in sizes take a full DIN row (up to 14 modules). The smaller panels take terminals, or modules edge to edge with no wiring room.
304 or 316L for a junction box?
304 for indoor washdown and inland outdoor sites; 316L for salt air, de-icing salt, brine, chlorinated cleaners and wastewater. Every size here comes in both. 304 vs 316L.
Is a junction box the same as a pull box?
No. A junction box holds splices and terminals; a pull box is a pull point in a conduit run, and for conductors of 4 AWG and larger NEC 314.28 sets its minimum dimensions from the raceway size.
