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Manufacturer Resources
Product Specs
- Application:
- Used as a other low voltage system within the room
- Certifications:
- UL Listed
- Product Category:
- Grounding accessories
- Product Height:
- 6.63 in
- Product Length Depth:
- 3.13 in
- Product Weight:
- 7.1 lb
- Product Width:
- 20 in
- Special Features:
- Include ground bar assembly, hex nuts,lock washer
- Department:
- Electrical
- Product Model:
- Telecommunications main grounding bar
- Product Material:
- Copper bar
B-LINE SBTMGB20 – Frequently Asked Questions
1) What is the B-Line SBTMGB20 ground bar used for in a telecom room?
The B-Line Eaton SBTMGB20 is a telecommunications main grounding bar (TMGB), the single point in an equipment or entrance room where rack, cabinet, cable shield, and other low voltage bonding conductors come together. It is a solid copper bar, so it serves as the master bonding point that the rest of the room's grounding busbars and equipment bond back to.
2) How much wall space do I need to mount a 20 inch telecom ground bar?
Plan for a footprint of 20 inches wide by 6.63 inches high, with 3.13 inches of length/depth off the wall for the SBTMGB20. That depth figure includes the standoff insulator portion of the assembly, so leave clearance behind and below the bar for conductor bends and lug landings. The complete unit weighs 7.1 lb, light enough for standard plywood backboard or masonry anchoring.
3) Does the SBTMGB20 grounding bar come with mounting hardware or do I have to buy it separately?
The kit ships as a ground bar assembly with hex nuts and lock washers included. What is not in the box is the anchoring into your wall or backboard, and the compression lugs for your bonding conductors, so order those to match your conductor sizes and your wall substrate.
4) What part number do I order for the 20 inch B-Line telecommunications main grounding bar?
Order Eaton B-Line SBTMGB20. That is the single catalog number covering the 20 inch wide copper TMGB assembly with its nuts and washers, so there are no finish or size suffixes to add.
5) Why copper instead of a plated or aluminum busbar for a main grounding bar?
The SBTMGB20 uses a copper bar, which is what you want at the main grounding point because copper mates directly with the copper bonding conductors and copper compression lugs used throughout a telecom room, avoiding the dissimilar metal corrosion you get when copper lands on aluminum. Copper is the standard material assumption in telecom bonding practice.
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Does the B-LINE SBTMGB20 come with a warranty?
Absolutely. The B-LINE SBTMGB20 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
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