Earthing Bonds

ERICO manufactures prefabricated Earthing Bonds to customized specifications. These bonds are made from galvanized or copper cables. The ERICO CADWELD exothermic connection process is employed to attach an earth plate on one end of the bond and a steel connection plate on the other end. The steel connection plate is welded on site to reinforcing bars or steel beams.

Low resistance to corrosion makes a permanently welded CADWELD bond the best solution for connections inside concrete structures. The property of low resistance is important for earthing and cathodic protection of reinforcing bars and steel beams in bridges and tunnels. However, other acceptable methods of connections are to combine a CADWELD connection and a mechanically crimped connection, or a mechanically crimped connection on both ends of the Earthing Bond.

An equipotential bond between all current carrying elements in a structure and earth is required for personnel safety in case of catenary failure. A cathodic protection system prevents damage to steel work due to corrosion and reduces expensive maintenance.

How To

The connection is made to reinforcing bars prior to pouring the concrete. The steel connection plate is connected the steel reinforcing bars by welding in place. The earth plate is temporarily bolted or nailed to the internal surface of the formwork. When the formwork is removed only the connecting surface of the earth plate appears. The earth plate is equipped with a threaded hole in order to connect the standard lug of an earth cable. When the reinforcing bars are discontinuous (expansion joints for example), Earthing Bonds connect
them electrically by means of prefabricated jumpers made from an insulated flexible cable equipped on each end with a standard lug.

Benefits

• Earthing Bonds (CADWELD - CADWELD) can be custom manufactured according to your specifications.
• Earthing Bonds are available in 500 and 1000 mm lengths, and in 70 and 95 mm≤ diameters.
• ERICO offers three styles of construction:
1. CADWELD - CADWELD Earthing Bond.
2. CADWELD - Mechanically Crimped Earthing Bond, earth plate welded with CADWELD,
   steel plate mechanically crimped.
3. Crimped -Crimped Earthing Bond, earth plate and steel plate both mechanically crimped.
• Increased resistance to corrosion with the use of the earthing bonds.
• Reduces expensive maintenance
• The use of Earthing Bonds provides increased safety to personnel.

DOWNLOAD FLYER - Earthing Bonds and Earthing Connections for Electrical Railways