The components on MD4000 single board computer runs on 3.3V. If 3.3V are supplied directly to the MD4000 board (eliminating the DC-DC converter) then the system becomes intrinsically safe. No sparks can occur at that low voltage. The higher amperage demanded at this lower voltage is between 5-6 Amps. The mesh node enclosure uses power connectors other than the RJ45 connectors. Please contact MeshDynamics Technical Staff for details on connectors shown and other modifications needed to pass the requirements for MSHA and similar hazardous environment certifications.