Michigan Administrative Code
Department - Licensing and Regulatory Affairs
Bureau of Fire Services
Storage and Handling of Gaseous and Liquefied Hydrogen Systems
Part 2 - STORAGE AND HANDLING OF GASEOUS HYDROGEN NFPA 50A
Chapter 5 - Operation and Maintenance
Section R. 29.7051 - Stray or impressed currents and bonding

Rule 51. Sections 5-5 to 5-5.3 of the storage and handling of gaseous and Liquefied H2 code are added as follows:

5-5 Stray or impressed currents and bonding.

5-5.1 Where stray or impressed currents are used or can be present on dispensing systems, such as cathodic protection, protective measures to prevent ignition shall be taken.

5-5.2 Static protection between the fuel dispenser and the vehicle shall not be required where H2 is transferred by conductive hose, flexible metallic tubing, or pipe connections where both halves of the metallic couplings are in continuous contact.

5-5.3 The transfer surface shall be concrete or shall have a resistivity not exceeding API-RP 2003, "protection against ignitions arising out of static, lightning, and stray currents," adopted by reference in section 8-1, performance criteria of 1 megohm as measured using a method acceptable to the department, such as EN 1081 1998 "Resilient Floor Coverings - Determination of the Electrical Resistance.", adopted by reference in section 8-1.