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Ground Rod Splice, Heavy Duty

Heavy duty connections were originally developed to be used on reclaimed cable. The heavy duty connections use a larger size connection cavity in the mold and a larger size welding material than the equivalent standard duty connection.

The larger size welding material supplies extra BTU’s to melt the heavy oxide coating on the conductor and to overcome some severe field conditions. Heavy duty connections eliminate cutting the run conductor on certain types of connections, reduce cable cleaning requirements for old or reclaimed cable, and increase reliability under adverse field conditions.

Heavy duty connections are increasingly being specified for copper-coated steel conductor connections.


  • Forms a permanent, low resistance connection
  • Provides a molecular bond
  • nVent ERICO Cadweld Exothermic Connections are rated with the same current capacity as the conductor
  • Portable installation equipment with no external source of power required
  • Installers can be easily trained to make nVent ERICO Cadweld Exothermic Connections
  • Connections can be visually inspected


HD Heavy Duty Designation
XX Mold Family
X Price Key
XX Ground Rod Code
L* Split Crucible Crucible section is split on molds designed with horizontal opening for easier cleaning
M* Mold Only
W* Wear Plates Reduce mechanical abrasion of molds at cable entry points
* Empty if none


The search below may not contain all product options. For made-to-order configurations, consult the chart above.

Ground Rod Type
Mold Family
Ground Rod Diameter, Nominal
Ground Rod Diameter, Actual

Mold Family

Connects To: Identical Ground Rod
Ground Rod Type: Copper-bonded
Part Number Mold Family Ground Rod Diameter, Nominal Ground Rod Diameter, Actual Certifications
HDGBD16 GB 5/8" 0.563" cULus
HDGBD16W GB 5/8" 0.563" cULus
HDGBF18 GB 3/4" 0.682" cULus
HDGBF18W GB 3/4" 0.682" cULus
HDGBF22 GB 1" 0.914" cULus
HDGED18 GE 3/4" 0.682"
Ground Rod Type: Steel
Part Number Mold Family Ground Rod Diameter, Nominal Ground Rod Diameter, Actual Certifications
HDGBR12 GB 3/8" 0.375" cULus
HDGBC14S GB 1/2" 0.505" cULus
HDGBD31 GB 5/8" 0.625" cULus
HDGBD31W GB 5/8" 0.625" cULus
HDGBF33 GB 3/4" 0.750" cULus
HDGBF33W GB 3/4" 0.750" cULus
HDGBF37 GB 1" 1.000" cULus
For applications such as computer room, tunnel or other low-ventilation areas, specify a smokeless nVent ERICO Cadweld Exolon mold. Add an XL prefix to the standard mold part number when ordering (for example, a TAC2Q2Q becomes XLTAC2Q2Q). Similarly, nVent ERICO Cadweld Exolon welding material is also designated by the XL prefix (for example, 150 becomes XL150).
A gap between conductors may be required. See mold tag for more information.

nVent, nVent CADDY, nVent ERICO, nVent ERIFLEX, and nVent LENTON are owned by nVent or its global affiliates. All other trademarks are the property of their respective owners. nVent reserves the right to change specifications without prior notice.

UL, UR, cUL, cUR, cULus and cURus are registered certification marks of UL LLC.