Use individual cable glands for suitable jacketed cables that need retention at the cabinet wall. Use conduit when the installation needs a raceway, mechanical protection, or a permitted route for individual insulated conductors. Neither choice alone establishes wiring segregation or makes an unsuitable cable acceptable for building wiring.
For a cabinet carrying mains power, two multiconductor Class 2 cables, and two Ethernet cables, start with separate power and signal entry zones. Then choose each entry around the cable construction, external route, and service access. A protected rear entry can work, but an open hole behind the cabinet is not a complete wiring method.
How the two entry methods compare
A cable gland manages the point where a cable crosses the enclosure wall. Conduit protects and routes wiring between locations. The two can serve different parts of the same installation rather than competing for every connection.
| Decision point | Individual cable glands | Conduit entries |
|---|---|---|
| Suitable wiring | Jacketed cable matching the gland's intended use and clamping range | Conductors or cables permitted for the selected raceway and installation |
| Strain relief | Can retain the cable when the fitting is designed and installed for that duty | Secures the raceway; does not automatically provide cable strain relief |
| Abrasion protection | Protects the cable at the enclosure penetration | Protects the routed wiring; entry fittings must also prevent insulation damage |
| External mechanical protection | Does not protect the exposed cable run | Provides protection appropriate to the selected raceway type |
| Mains and signal segregation | Separate holes make entry zones easier to organize | Separate raceways make routes easier to organize; shared use requires a specific compliance check |
| Space at the wall | Needs room for gland bodies, locknuts, tools, and cable bends | Needs room for fittings, raceway bends, supports, and conductor pulling |
| Cable replacement | Usually straightforward for unterminated cables | Depends on route length, bends, fill, and access to pulling points |
| Rear entry | Possible with adequate clearance and a protected cable route | Possible with an appropriate rear connection and accessible installation arrangement |
A bare grommet provides edge protection, not necessarily retention or an environmental seal. The narrower distinction is covered in rubber grommet vs cable gland for a thick panel.
Keep enclosure protection separate from wiring-method approval. The stainless wall-mount enclosures are rated NEMA 4X / IP66 by the manufacturer; not UL listed. That rating does not establish which cables may enter them or how those cables may run through a building.
Where individual cable glands work best
Individual glands suit a small number of jacketed cables entering a dry indoor cabinet. They give each cable an identifiable entry and make separate routing zones easy to maintain.
For two multiconductor output cables and two Ethernet cables, four single-cable glands are a straightforward starting point. Each gland must match its cable's actual outside diameter and jacket construction. A suitable mains cable could use another entry, subject to the installation's permitted wiring method.
Do not select the gland from conductor gauge alone. An 18 AWG multiconductor cable can have very different outside dimensions depending on conductor count, shielding, and jacket construction. Measure the finished cable and use the fitting documentation. The cable gland clamping range article explains that selection in detail.
Check retention separately from sealing. The gland must withstand the expected cable loading without transferring that loading to terminals. Support long or heavy cable runs outside the cabinet rather than leaving their weight on the entry. Use the sealed-entry strain relief article when defining those supports.
Ethernet needs particular care around compression and bending. Excessive gland tightening can deform the jacket and disturb the cable geometry. Follow both the cable's handling limits and the gland's installation instructions.
A factory-terminated Ethernet cable also changes the assembly sequence. The connector may not pass through a conventional gland sized for the cable jacket. Choose an entry intended for that arrangement rather than enlarging the seal. The connector-through-gland article covers that specific problem.
Where conduit works best
Conduit is the stronger starting point when mains wiring forms part of a fixed building installation. It is also useful where the route needs protection against impact, abrasion, or interference from nearby equipment.
Individual insulated conductors generally need a permitted raceway or another approved wiring method outside the cabinet. A cable gland around loose conductors does not create that system. Select the raceway, conductors, connectors, supports, and enclosure connection as one installation.
Conduit does not automatically solve every mechanical requirement. A connector secures the raceway to the cabinet, but cables may still need separate support or retention. Flexible raceway must also be supported and applied within its intended use.
Account for raceway fill, bend limits, pulling access, and any applicable conductor ampacity adjustments. A short connection may look simple while leaving too little room to pull or terminate the wiring. Reserve internal bending space before fixing the entry position.
Metal raceways and cabinets also need an effective fault-current path. Do not assume that any locknut arrangement provides the required bonding under every installation condition. Use the enclosure grounding and bonding guide for the fundamentals, then specify the appropriate connection and equipment grounding arrangement.
Conduit may also carry Ethernet or Class 2 cables when appropriate for the installation. That does not mean they should share the mains raceway. Shared routing requires checking the applicable circuit, cable, barrier, and separation rules before layout approval.
Decide from the route and indoor environment
A dry room removes some weather exposure, but it does not remove mechanical or electrical requirements. Check access, accidental contact, cleaning practices, dust, and the full cable route beyond the cabinet.
Separate mains, Class 2, and Ethernet deliberately
Treat mains power, Class 2 outputs, and Ethernet as separate routing groups during layout. Separate entry zones help preserve those groups through terminals, wiring ducts, and external cable supports.
A 24 VDC output is not automatically a Class 2 circuit. Confirm the source's Class 2 designation and follow its output wiring instructions. Do not derive circuit classification from voltage or a single assumed current limit.
Likewise, a high insulation-voltage marking does not automatically permit Class 2 or communications wiring beside mains conductors. Applicable wiring rules can require separation or barriers beyond insulation suitability. Do not apply one universal spacing dimension to every cabinet.
Plan electromagnetic compatibility separately from electrical safety. Avoid long parallel runs between Ethernet and power wiring, especially motor or drive wiring. Where a crossing is necessary, a near-right-angle crossing can reduce coupling, but it does not replace required segregation.
Use a multi-cable entry when density justifies it
A multi-cable entry becomes useful when individual fittings consume too much wall area or complicate replacement. Choose a system with inserts intended for the actual cable diameters and connector arrangement.
One opening does not mean one unrestricted bundle. Confirm how each cable is retained, how unused positions are closed, and whether the assembly suits the required separation. Keep mains separate unless the complete arrangement is expressly suitable for the circuits involved.
The gland plate vs split cable entry comparison addresses that hardware choice. Here, the first decision remains whether the external route needs exposed cable entries or a raceway.
Use rear entry only with a complete protected route
Rear entry can hide cables and align the cabinet with a wall raceway or protected wiring space. It must still provide edge protection, suitable fittings, cable support, and the required separation.
Measure the space behind the cabinet before choosing fittings. Include gland projection, locknut access, connector length, cable bend radius, and mounting hardware. A cabinet mounted close to a wall may leave no usable space for a conventional rear gland.
An enclosure covering a wall opening does not automatically make concealed cabling acceptable. Verify the cable's permitted building use and any required treatment of the wall penetration. The wall cable-hole enclosure article addresses that boundary.
For accessible side or bottom entries, leave enough room for cable bends and supports without obstructing service access. Top entries can be appropriate indoors, but consider falling debris and cleaning exposure before selecting them.
What to specify before cutting the cabinet
Write the entry schedule before placing holes. It should identify the wiring method for each circuit group, not merely show circles on a drawing.
| Order or drawing item | Information to provide |
|---|---|
| Circuit groups | Mains voltage, verified Class 2 outputs, Ethernet, and any other circuit classifications |
| External route | Exposed cable, raceway, protected rear route, or another permitted wiring method |
| Cable schedule | Cable designation, conductor count, outside diameter, shielding, and termination status |
| Entry hardware | Exact fitting reference, thread type, cutout dimensions, panel-thickness range, and intended retention duty |
| Segregation | Separate entry zones, internal routes, barriers where required, and terminal locations |
| Mechanical clearance | External bend space, internal termination space, tool access, and cable-support positions |
| Enclosure requirement | Material, dimensions, environmental protection, and any project listing requirement |
| Future changes | Reserved entry positions and suitable closures for unused openings |
Use the actual fitting drawing for the cutout. A nominal conduit trade size is not the required hole diameter. Also check whether the fitting requires a clearance hole, threaded opening, sealing washer, or specific contact surface.
Lay out mains terminals near the mains entry without compromising required bending space. Place Class 2 and Ethernet terminations so their cables do not cross the power section unnecessarily. Keep glands and conduit fittings clear of the removable mounting panel and door movement.
The cutout designer can lay out openings and check spacing. It does not determine circuit segregation, cable suitability, or code compliance for the completed installation.
For custom stainless enclosures and factory cutouts, send the entry schedule with the layout. Review seals, fittings, rear clearance, and internal routing on the approval drawing before cutting. New openings do not automatically preserve the original enclosure rating.
Enclosures for this job
Catalog sizes that suit the job this article answers, picked from its subject; open one for its full specifications.
| Enclosure | Material | Outside H x W x D / display | Rating |
|---|---|---|---|
| 60 × 36 × 16 in | 304 stainless | 60 x 36 x 16 in | Rated NEMA 4X / IP66 by the manufacturer; not UL listed |
| 48 × 36 × 16 in | 304 stainless | 48 x 36 x 16 in | Rated NEMA 4X / IP66 by the manufacturer; not UL listed |
| 60 × 36 × 12 in | 304 stainless | 60 x 36 x 12 in | Rated NEMA 4X / IP66 by the manufacturer; not UL listed |
| 12 × 10 × 6 in | 304 stainless | 12 x 10 x 6 in | Rated NEMA 4X / IP66 by the manufacturer; not UL listed |
Questions
Do two output cables and two Ethernet cables need four glands?
For four jacketed cables, four single-cable glands are a straightforward arrangement. Each must suit its cable diameter, jacket, and retention requirements. A purpose-designed multi-cable entry can reduce the number of openings, but several cables should not be bundled through a seal designed for one cable.
Can mains, Class 2 outputs, and Ethernet share one conduit?
Do not assume that shared routing is permitted. The answer depends on circuit classification, cable construction, applicable wiring rules, and any required barriers or separation. Separate raceways and entry zones provide a clearer starting layout. Insulation voltage alone does not establish permission to mix these circuits.
Can cables enter through the back of an indoor cabinet?
Rear entry is possible when the wiring route is permitted and protected. The opening still needs suitable fittings, abrasion protection, support, and segregation. Check space for fitting projection, cable bends, and installation tools. Covering a wall hole with the cabinet does not by itself complete the wiring method.
Does a cable gland make any cable suitable for permanent building wiring?
No. A gland manages the enclosure penetration but does not change the cable's permitted uses. Check the cable designation against the complete route, including concealed spaces and environmental conditions. Flexible cord, tray cable, and communications cable have different application limits that an entry fitting cannot override.
