Which standard specifies that lightning protection grounding disconnect cards be connected using M12 bolts?
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I would like to ask the experts: which standard specifies that lightning protection grounding disconnect cards should be connected using M12 bolts?
Construct in accordance with the following national standard atlas: (1) \"Installation of equipotential bonding\" 02 D501—2； (2) \"Installation of Lightning Protection and Grounding Devices Using Building Metal Structures\" 03 D501—3 ； (3) “Installation of Grounding Devices” 03 D501—4 ； (4) “Installation of Lightning Protection Facilities for Buildings” 07D501—1.
Thank you to the moderator for their helpful assistance. Is there any design standard that specifies this?
National standard atlases and specifications have equal validity
For the petrochemical industry, clause 4.1.2 of GB 15599-2009 sets out requirements regarding the grounding of metal storage tanks
GB 50149-2010 Code for Construction and Acceptance of Busbar Work in Electrical Installation Projects
Regarding the question from this marine enthusiast about which specification mandates the use of M12 bolts for connecting lightning protection grounding disconnect cards, in my opinion this is unreasonable and has no basis; the design specifications do not specify any requirements regarding the size of the connection bolts – only the standard drawings for lightning protection grounding include relevant size details and requirements! For details, please refer to the attached image; follow it accordingly! As shown on pages 29 and 30 of \"15D501 Installation of Lightning Protection Facilities for Buildings\".