Burndy BIBS3503DB Direct Buria...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$75.69
Burndy BIBS3503DB Direct Burial Submersible Multi-Tap Connector, 3-Conductor Al/Cu

Burndy BIBS3503DB Direct Burial Submersible Multi-Tap Connector, 3-Conductor Al/Cu

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Model: BIBS3503DB

In Stock (leaves warehouse same day if ordered before 3pm ET)

$75.69
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Burndy BIBS3503DB Direct Burial Submersible Multi-Tap Connector, 3-Conductor Al/Cu

The Burndy BIBS3503DB is a direct burial, submersible, dual-rated Al/Cu connector built for demanding underground and wet-location electrical work. This 3-conductor, single-sided multi-tap connector accepts a wide 12 AWG-350 kcmil conductor range and is finished with an EPDM rubber covering for reliable environmental sealing. It ships with an oxide inhibitor pre-installed, streamlining installation while helping protect the aluminum-to-copper connection against oxidation over time. As part of Burndy's UNITAP™ series, it is engineered for run/tap applications where dependable, code-compliant connections below grade or underwater are required.

Key Features

  • Direct Burial & Submersible Rated: Purpose-built for direct burial and submersible installations, allowing secure below-grade or underwater electrical connections.
  • Dual-Rated Al/Cu Construction: Aluminum body construction rated for both aluminum and copper conductors, giving installers flexibility across mixed-metal systems.
  • 3-Conductor, Single-Sided Multi-Tap Design: Three ports arranged on a single side support efficient run/tap connections in one compact connector body.
  • Wide Conductor Range: Accommodates 12 AWG-350 kcmil copper conductors and 10 AWG-350 kcmil aluminum conductors, covering a broad range of wire sizes.
  • EPDM Rubber Covering: An EPDM rubber covering provides environmental sealing suited to underground and wet-location exposure.
  • Pre-Installed Oxide Inhibitor: Oxide inhibitor is pre-applied at the factory, reducing field prep time and supporting long-term connection integrity.
  • Insulated Connector: Supplied as an insulated connector for added protection at the termination point.
  • Burndy UNITAP™ Series: Part of Burndy's UNITAP™ multi-tap connector line, identified by the Run/Tap product type.

Technical Specifications

  • Conductor Range: 12-AWG
  • Ports: 3
  • Product Material: Aluminum
  • Direct Burial: Yes
  • Insulated: Yes
  • Series: Unitap
  • Connector Type: Multi Tap
  • Conductor - AL Str Size Range: 10 AWG - 350 kcmil
  • Conductor - Copper Str Size Range: 12 AWG - 350 kcmil
  • Product Type: Run/Tap
  • Trade Name: UNITAP™

Typical Applications

  • Underground and Direct-Burial Electrical Systems
  • Submersible and Wet-Location Wiring Installations
  • Utility and Municipal Power Distribution
  • Run/Tap Connections in Commercial and Industrial Systems
  • Renovation and New Underground Construction

Why Burndy?

Burndy's BIBS3503DB pairs dual-rated Al/Cu construction with a direct burial and submersible rating, an EPDM rubber covering, and a pre-installed oxide inhibitor to support long-service connections in harsh underground and wet environments. As part of the UNITAP™ series, it reflects Burndy's focus on dependable, code-compliant connectors for demanding run/tap applications across commercial, industrial, and utility electrical systems.

Manufacturer Resources

Spec Sheet

Product Specs

list_batch:
BURNDY-20260915
Wire Size:
12-AWG
Ports:
3
Direct Burial:
Yes
Insulated:
Yes
Series:
Unitap
Connector Type:
Multi Tap
Conductor - AL Str Size Range:
10 AWG - 350 kcmil
Conductor - Copper Str Size Range:
12 AWG - 350 kcmil
Product Type:
Run/Tap
Trade Name:
UNITAP™
Product Material:
Aluminum
Department:
Electrical
Product Subgroup:
Lugs & Terminals
Product Group:
Wire Connectors & Terminals

Burndy BIBS3503DB – Frequently Asked Questions

1) Can the Burndy BIBS3503DB be buried directly in the ground or installed in a flooded handhole?
Yes. The BIBS3503DB is a direct burial connector and is rated submersible, so it can go below grade or sit in a wet or flooded vault without an additional enclosure. The seal comes from an EPDM rubber covering over the insulated body, which is what handles the moisture exposure.
2) What wire sizes fit the BIBS3503DB, and are they the same for aluminum and copper?
The ranges differ slightly. Copper stranded conductors are accepted from 12 AWG up to 350 kcmil; aluminum stranded runs 10 AWG up to 350 kcmil. So if you are landing a small aluminum tap, 10 AWG is your floor, while copper goes two sizes smaller.
3) Can I mix aluminum and copper conductors in the same connector?
Yes. The BIBS3503DB is a dual-rated AL9CU-style connector with an aluminum body accepting both aluminum and copper conductors, and it ships with the oxide inhibitor already applied at the factory. That is what lets you land a copper tap off an aluminum run in the same body without adding compound in the field.
4) How many conductors does the BIBS3503DB take, and how are the ports arranged?
Three ports, all on one side of the body. It is a single-sided multi-tap connector, so the run and the taps all enter from the same face, which is the arrangement you want when you have limited working room on one side of a raceway or vault wall.
5) Do I need to add taping or a separate insulating cover after making up the connection?
No. The BIBS3503DB is supplied insulated with an EPDM rubber covering over the connector body, so it is complete as shipped for direct burial and submersible use. No extra sleeve, tape build-up or potting kit is part of the assembly.
6) Is a UNITAP multi-tap connector the right choice, or should I use separate lugs and a bus?
A UNITAP run/tap connector like the BIBS3503DB is for making a tap off a run in one compact insulated body, without a panel, bus or terminal block. With three ports covering 12 AWG to 350 kcmil, it suits underground feeder taps, utility and municipal distribution, and wet-location branch connections. If you need more than three conductors landed or a bolted, re-openable termination on equipment, individual lugs on a bar are the better approach.
7) Is the oxide inhibitor already in the ports on the BIBS3503DB or do I brush it in myself?
It comes pre-installed from the factory. The ports are loaded with oxide inhibitor before shipping, so field prep is limited to stripping and brushing the conductor and torquing the setscrews. That matters most on the aluminum side, where the inhibitor is what protects the connection against oxidation over its service life.
8) What is the exact Burndy part number and where can I get the spec sheet for the 350 kcmil direct burial multi-tap?
The part is Burndy BIBS3503DB, UNITAP series, sold as a single connector. Burndy publishes the spec sheet for it at https://hubbellcdn.com/specsheet/BRDY-BIBS3503DB-SPEC-EN.pdf, which is the document to hand a plan reviewer or attach to a submittal package.
How fast can I get the Burndy BIBS3503DB delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Burndy BIBS3503DB come with a warranty?
Absolutely. The Burndy BIBS3503DB is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Burndy BIBS3503DB?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
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