Product Technical Guides : US-EN Direct Fastening - Volume 1 Edition 22 | Page 91

Direct Fastening Technical Guide , Edition 24
3.2.15.6.3 Technical data Application examples
Functional and protective bonding of pipes ( outer diameter of installed surface ≥ 5.9 ”). Only for Type A cable connections
Protective bonding circuit – double point connection
Functional bonding and terminal connection in a circuit For permanent current ( leakage current ) due to static charge built up in pipes or when closing an electrical circuit .
Single point connection
Recommended electrical connectors
Maximum allowable permanent current
Notes
Type A
Type B
S-BT-ER W10 / 15 SN 6 S-BT-EF W10 / 15 AN 6
S-BT-ER W10 HC AWG2 S-BT-EF W10 HC AWG2
S-BT-ER W10 HC AWG4 / 0 S-BT-EF W10 HC AWG4 / 0
= 57 A
= 125 A
= 269 A
Recommended maximum cross section of connected cables according to IEC 60947-7-2 and IEC 60947-7-1 : Type A : 8 AWG copper ( tested permanent current = 57 A ) Type B : 2 AWG copper ( tested permanent current = 125 A ) 4 / 0 AWG copper ( tested permanent current = 269 A )
Fastening of thicker cable is acceptable , if the maximum allowable permanent current is not exceeded and the provisions on cable lug thickness are observed .
Protective bonding circuit ( continued on next page ) For discharging short circuit current while protecting electrical equipment or earth / ground or bonding cable trays and ladders
Single point connection
Recommended electrical connectors
Maximum short circut current according to IEC and UL
Notes
Type A
S-BT-ER W10 / 15 SN 6 S-BT-EF W10 / 15 AN 6
= 1.20 kA ( IEC ) = 0.75 kA ( UL )
Recommended maximum cross section of connected cables according to IEC 60947-7-2 and IEC 60947-7-1 : Type A : 8 AWG copper ( tested short circuit current = 1.20 kA for 1 s ) Type B : 2 AWG copper ( tested short circuit current = 4.20 kA for 1 s ) 4 / 0 AWG copper ( tested short circuit current = 14.40 kA for 1 s )
Type B
S-BT-ER W10 HC AWG2 S-BT-EF W10 HC AWG2
S-BT-ER W10 HC AWG4 / 0 S-BT-EF W10 HC AWG4 / 0
= 4.20 kA ( IEC ) = 3.90 kA ( UL )
= 14.40 kA ( IEC ) = 10.10 kA ( UL )
Recommended maximum cross section of connected cables according to UL 467 : Type A : 10 AWG copper ( tested short circuit current = 0.75 kA for 4 s ) Type B : 2 AWG copper ( tested short circuit current = 3.90 kA for 6 s ) 4 / 0 AWG copper ( tested short circuit current = 10.10 kA for 9 s ) Fastening of thicker cable is acceptable , if the maximum short circuit current and the exposure time is not exceeded and the provisions on cable lug thickness are observed .
91