S-BT Threaded Fastener Specification
Table Of Contents
- 1.1 Definition
- 1.2 The S-BT system
- 1.3 Fastening mechanism
- 1.4 S-BT system features and benefits – simplified fastening to steel
- 2.1 Grating fastening system
- 2.2 Grating fastening system X-FCS-R
- 2.3 S-BT with MM and MQ installation channel system
- 2.4 Fastening instrumentation, junction boxes and lighting
- 2.5 Fastening cable / conduit connectors
- 2.5 Fastening cable tray supports
- 2.7 Electrical connections
- 3.1 Product data
- 3.2 Load data
- 4.1 Instruction for use - S-BT-MF M6, M8, M10, W6, W10
- 4.2 Instruction for use - S-BT-MF M8/7 AN 6
- 4.3 Instruction for use - S-BT-MR M6, M8, M10, W6, W10 SN 6
- 4.4 Instruction for use - S-BT-MR M8/7 SN 6
- 4.5 Instruction for use - S-BT-MR M6, M8, M10, W6, W10 SN 6 AL
- 4.6 Instruction for use - S-BT-MR M8/7 SN 6 AL
- 4.7 Instruction for use - S-BT-GF M8/7 AN 6
- 4.8 Instruction for use - S-BT-GR M8/7 SN 6
- 4.9 Instruction for use - S-BT-GR M8/7 SN 6 AL
- 4.10 Instruction for use – S-BT-EF M6/W6/M8
- 4.11 Instruction for use – S-BT-EF M10/W10
- 4.12 Instruction for use – S-BT-ER M6/W6/M8
- 4.13 Instruction for use – S-BT-ER M10/W10
- 4.14 Instruction for use – S-BT-EF W10 HC AWG2/0 and S-BT-EF M10 HC 35/120
- 4.15 Instruction for use – S-BT-ER W10 HC AWG2/0 and S-BT-ER M10 HC 35/120
- 5.1 Nomenclature and symbols
- 5.2 Design concepts
- 5.3 Static capacity of the S-BT threaded stud
- 5.4 Vibration effects on S-BT threaded stud fastenings
- 5.5 Resistance of S-BT fastenings under dynamic tensile loading
- 5.6 Effect of S-BT threaded stud fastenings on the fatigue strength of base material structural steel
- 5.7 Influence of glue coatings on the loosening torque
- 5.8 S-BT-ER and S-BT-EF screw-in threaded studs for electrical connections
- 5.9.5 Conductivity disc of S-BT-ER / -EF electrical connectors
- 5.9.4 Stainless steel S-BT studs
- 5.9.3 Carbon steel S-BT studs
- 5.9.2 Galvanic (contact) corrosion
Specifications page83
S-BT Screw-in threaded studs
5.9.2 Permanent current
Forpermanentcurrent(leakagecurrent)duetostaticbuiltupinpipesorwhen
closinganelectricalcircuit.
Test Standard Requirements or Test criteria
Thetemperatureofthefasteningpointshouldnotexceed
thelimitsofthecableunderpermanentcurrent,
e. g.45°CforPVCcables.
Testduration:tillstabletemperatureisreched.
IEC60947-7-1
IEC60947-7-2
5.8 X-BT-ER stainless steel threaded studs electrical performances
5.8.1 Permanent current
X-BT-ER M10/3 SN 4
X-BT-ER W10/3 SN 4
X-BT-ER M8/7 SN 4
X-BT-ER M6/7 SN 4
X-BT-ER W6/7 SN 4
Fasteners
Test
standard
IEC EN 60204-1:2006, Table 6 and D.5
Test criteria
The temperature of the fastening point
should not exceed the limits of the
cable under permanent current, e.g.
70°C (environmental temp at 40°C), for
PVC cables.
Test duration: Till temperature stability
is reached.
Tested Configuration Tested Fasteners Test Results
Single point connection
X-BT-ER M10/3 SN 4
X-BT-ER W10/3 SN 4
X-BT-ER M8/7 SN 4
X-BT-ER M6/7 SN 4
X-BT-ER W6/7 SN 4
Current
Max. temp (in° C)
Result
22 A 32.0° C PASS
32 A 39.1° C PASS
40 A 48.9° C PASS
60 A 78.8° C FAILED
Note: At 60 A, which is deduced from a protective grounding cable with cross section of 16 mm² (EN 60204-1; Tab 6), the maximally
permissible temperature for PVC cables was exceeded for the connection. The maximum temperature permissible under normal condition
is 70°C.
For low permanent current due to static charge built up in pipes or for low permanent current when closing an electrical circuit
Conclusion
Based on wire sizes as per EN 60204-1:1997
Wire size (Max.) Current Connection configuration
Note: If the fastener is used in an environment and with
cables which are heat resistant up to at least 90°C, then
wire sizes up to 16 mm² can be used.
10 mm
2
(8 AWG)
40A Single point connection
Based on permanent current withstand ability
Current (Max.) Max. temp (in° C) Connection configuration
Note: If the fastener is used in an environment and with
cables which are heat resistant up to at least 90°C, then
permanent currents up to 60 A can be applied.
40A 48.9° C Single point connection
or
Test Report No. 09-IK-0208.32V2_e; Electrosuisse, Fehraltorf, Switzerland; May 2010
Test Report No. CF-791; Dehn und Söhne GmbH, Neumarkt, Germany; March 2006
Test Report No. 70064671; TÜV Test Centre, Frankfurt, Germany; March 2004
Test Report No. 09-IK-0208: Suitability of Hilti X-BT-ER threaded studs as connection point in protective grounding and earthing circuits
and for lighting protection; Electro-suisse, 2015
5.8 X-BT-ER stainless steel threaded studs electrical performances
5.8.1 Permanent current
X-BT-ER M10/3 SN 4
X-BT-ER W10/3 SN 4
X-BT-ER M8/7 SN 4
X-BT-ER M6/7 SN 4
X-BT-ER W6/7 SN 4
Fasteners
Test
standard
IEC EN 60204-1:2006, Table 6 and D.5
Test criteria
The temperature of the fastening point
should not exceed the limits of the
cable under permanent current, e.g.
70°C (environmental temp at 40°C), for
PVC cables.
Test duration: Till temperature stability
is reached.
Tested Configuration Tested Fasteners Test Results
Single point connection
X-BT-ER M10/3 SN 4
X-BT-ER W10/3 SN 4
X-BT-ER M8/7 SN 4
X-BT-ER M6/7 SN 4
X-BT-ER W6/7 SN 4
Current
Max. temp (in° C)
Result
22 A 32.0° C PASS
32 A 39.1° C PASS
40 A 48.9° C PASS
60 A 78.8° C FAILED
Note: At 60 A, which is deduced from a protective grounding cable with cross section of 16 mm² (EN 60204-1; Tab 6), the maximally
permissible temperature for PVC cables was exceeded for the connection. The maximum temperature permissible under normal condition
is 70°C.
For low permanent current due to static charge built up in pipes or for low permanent current when closing an electrical circuit
Conclusion
Based on wire sizes as per EN 60204-1:1997
Wire size (Max.) Current Connection configuration
Note: If the fastener is used in an environment and with
cables which are heat resistant up to at least 90°C, then
wire sizes up to 16 mm² can be used.
10 mm
2
(8 AWG)
40A Single point connection
Based on permanent current withstand ability
Current (Max.) Max. temp (in° C) Connection configuration
Note: If the fastener is used in an environment and with
cables which are heat resistant up to at least 90°C, then
permanent currents up to 60 A can be applied.
40A 48.9° C Single point connection
or
Test Report No. 09-IK-0208.32V2_e; Electrosuisse, Fehraltorf, Switzerland; May 2010
Test Report No. CF-791; Dehn und Söhne GmbH, Neumarkt, Germany; March 2006
Test Report No. 70064671; TÜV Test Centre, Frankfurt, Germany; March 2004
Test Report No. 09-IK-0208: Suitability of Hilti X-BT-ER threaded studs as connection point in protective grounding and earthing circuits
and for lighting protection; Electro-suisse, 2015
Tested configuration Fasteners
Singlepointconnection,TypeA
S-BT-ERM10/15SN6
S-BT-ERW10/15SN6
S-BT-EFM10/15AN6
S-BT-EFW10/15AN6
S-BT-ERM8/15SN6
S-BT-EFM8/15AN6
Singlepointconnection,TypeB
S-BT-ERM10HC120
S-BT-ERW10HCAWG4/0
S-BT-EFM10HC120
S-BT-EFW10HCAWG4/0
Conclusions:
•Recommendedmaximalcrosssectionofconnectedcableaccording
IEC60947-7-2andIEC60947-7-1:
10 mm
2
(8AWG)copper(testedpermanentcurrentI
th
=57A)
120 mm
2
(4/0AWG)copper(testedpermanentcurrentI
th
=269A)
•Fasteningofthickercableisacceptable,ifthemaximumallowable
permanentcurrentI
th
isnotexceededandtheprovisionsoncablelugthickness
t
cl
areobserved.