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NSi Industries Submersible Wire Connector, 3-Port
The NSi Industries Submersible Wire Connector is a 3-port splicing connector engineered to join conductors ranging from 2/0 AWG up to 14 AWG within a single, watertight connection point. Built for submersible service, this connector is designed to protect splices from moisture intrusion in underground, wet, and below-grade electrical applications. Its multi-port body lets installers combine multiple conductor sizes in one compact, reliable connection, making it a practical choice for demanding field environments where a standard dry-location connector would fail. Electrical contractors, utility crews, and irrigation installers rely on connectors like this one whenever a splice has to be made below grade, inside a wet pedestal, or anywhere ongoing exposure to moisture is expected.
Key Features
- Wide Wire Range: Accommodates conductors from 2/0 AWG to 14 AWG, giving installers the flexibility to splice a broad mix of conductor sizes with a single connector instead of stocking multiple part numbers.
- 3-Port Configuration: Three ports allow multiple conductors to be joined in one connection point, simplifying splices in junction boxes, pedestals, meter bases, and underground enclosures.
- Submersible Rating: Designed for submersible use, sealing out moisture to protect the connection in wet, underground, and below-grade installations where corrosion and water intrusion are ongoing concerns.
- Compact, Field-Ready Body: Sized for use in tight enclosures and direct-bury applications where a dependable, watertight splice is required without adding bulk to the enclosure.
- Simplified Installation: Straightforward port design speeds up splicing work for electricians working on underground feeders, service laterals, and branch circuits.
- Reliable Long-Term Connection: Maintains a secure, watertight splice over time in buried and submerged conditions, reducing the need for future rework or troubleshooting.
Technical Specifications
- Refer to manufacturer documentation for complete technical specifications.
Typical Applications
- Underground and Direct-Bury Conductor Splicing
- Submersible Pump and Well System Wiring
- Outdoor and Wet-Location Electrical Connections
- Irrigation and Landscape Lighting Circuits
- Utility, Meter Base, and Pedestal Junction Splicing
- Renovation and New Construction Underground Feeders
Why NSi Industries?
NSi Industries builds connectors for the demanding conditions electricians and utility crews face in the field, and this submersible 3-port connector is designed specifically to keep splices protected from water intrusion while accommodating a wide 2/0 AWG to 14 AWG wire range. For underground, wet-location, and submersible pump applications where a dependable, watertight splice matters, NSi Industries provides a compact, multi-port connector built for that exact job, helping installers complete code-conscious work with confidence in below-grade and wet environments.
Manufacturer Resources
Spec Sheet
Product Specs
- Product Type:
- Multi-Tap Connector
- Wire Size:
- 2/0 AWG - 14 AWG
- Department:
- Electrical
- Product Group:
- Wire Connectors & Terminals
- Product Subgroup:
- Wire Connectors
NSi ISPB2/0-3 – Frequently Asked Questions
1) What wire sizes does the NSi ISPB2/0-3 submersible connector accept?
The NSi Industries 3-port submersible connector takes conductors from 2/0 AWG down to 14 AWG. That range covers most underground branch circuits and service laterals, and it means you can land mixed sizes (say a 2/0 feeder and a 14 AWG control or lighting leg) in the same connector instead of carrying several part numbers.
2) Can I bury an NSi ISPB2/0-3 connector directly in the ground without a box?
It is built for submersible service, so the splice body seals out moisture for underground, wet, and below-grade work including direct-bury runs. Typical uses are submersible pump and well wiring, irrigation and landscape lighting, and splices inside wet pedestals or meter bases.
3) How many conductors can I splice with a 3-port submersible connector?
Three. Each of the three ports takes one conductor, so the ISPB2/0-3 joins up to three wires at a single point. If your splice has four or more legs you need a higher port count connector, not this one.
4) What should I use instead of the NSi ISPB2/0-3 for dry-location splices on 12 AWG branch circuits?
The NSi ISPB2/0-3 is a 3-port submersible connector built for watertight splices in underground and wet locations, with a 2/0 AWG to 14 AWG wire range. For ordinary dry-location 12 AWG work inside a junction box, the Ideal Industries 30-1012 INSURE wire connector is sized for 12 AWG and comes in a 90-pack, which suits repetitive device and lighting splices where no moisture sealing is needed.
5) Is a twist-on wire nut okay for an underground splice, or do I need a submersible connector?
A standard dry-location connector will fail where water sits. Twist-on style products like the Ideal Industries 30-1012 INSURE connector are rated for 12 AWG dry-location work and come 90 to a pack, which is fine inside a device box but not below grade. For a buried or submerged splice, use a sealed submersible connector such as the NSi ISPB2/0-3, which is designed to keep moisture out of the connection long term.
6) What is the difference between a submersible multi-port connector and a compression line tap?
Different jobs. The NSi 3-port submersible connector is a sealed splice body: you insert the conductors into its ports and the housing keeps water out, which is what you want in a vault, pedestal, or buried run. A compression connector such as the Burndy YHD Series aluminum compression line tap is crimped with a tool to tap a conductor on overhead or utility-style work and is not a sealed submersible housing. Burndy also offers implosive connectors in the 9 Series and 9052 for utility conductor splicing.
7) What part number do I order for the NSi 3-port submersible connector?
Order NSi Industries ISPB2/0-3. It is a single configuration, so there are no finish or size options to specify, just the one 3-port body covering the full 2/0 AWG to 14 AWG range.
8) Is this connector suitable for a submersible well pump splice?
Yes, submersible pump and well system wiring is one of the applications it is built for, along with irrigation circuits and outdoor wet-location connections. With 2/0 AWG to 14 AWG capacity it handles both the pump leads and the feeder side of most residential and light commercial well installs.
9) Is the Burndy YHD line tap an equivalent to the NSi ISPB2/0-3?
They solve different problems. The NSi ISPB2/0-3 is a 3-port submersible connector that joins conductors from 2/0 AWG down to 14 AWG in one watertight connection point for below-grade and wet-location work. The Burndy YHD series is an aluminum compression line tap connector, which taps a run conductor and is crimped with a compression tool rather than ported for multiple conductor sizes. If the splice is buried or in a wet pedestal and you want a multi-port body, the YHD is not a drop-in swap.
10) What is the difference between the NSi ISPB2/0-3 and the Burndy IMPLO 9051 and 9052 connectors?
The NSi ISPB2/0-3 is a port-style connector: conductors from 2/0 AWG to 14 AWG are inserted into one of three ports and secured for a watertight splice suited to underground and submersible pump wiring. The Burndy 9 Series and 9052 Series are IMPLO implosive-technology connectors, installed by an implosive action rather than by ports, and are typically utility line work items. For an irrigation or well-pump splice in a buried enclosure, the NSi connector is the port-based option.
11) Can I use Wiremold W30/W30G pressure-type connectors for a below-grade splice instead of the NSi ISPB2/0-3?
No. The Wiremold W30W30G pressure-type wire connectors are steel-bodied connectors for 2000 Series raceway work, which is an interior dry application. The NSi ISPB2/0-3 is the one designed for submersible service, sealing the splice against moisture in underground, wet, and below-grade installations while accepting 2/0 AWG through 14 AWG conductors.
12) Will the ISPB2/0-3 fit inside a tight pull box or pedestal?
The connector uses a compact body sized for tight enclosures and direct-bury work, so it is intended to splice in junction boxes, pedestals, meter bases, and underground enclosures without eating up the box fill a bulkier splice kit would.
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Does the NSi ISPB2/0-3 come with a warranty?
Absolutely. The NSi ISPB2/0-3 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
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