1. Vo vnútri zariadenia, spojenia medzi rôznymi komponentmi musia využívať izolované vedenie s medeným jadrom, ktoré môžu byť buď štandardné drôty alebo káble. This wiring’s insulation needs to adhere to the equipment’s rated voltage criteria, a jeho kapacita pre prúdenie prúdu a výrobu tepla musí byť v súlade so zavedenými normami, similar to the requirements for intrinsically safe electrical devices.
2. Wires within the equipment must be routed to avoid any contact with parts that are either high-temperature or mobile.
3. Internal wiring should be tidily arranged and securely bundled. Avšak, it’s imperative that skutočne bezpečné wiring is not bundled together with other types of wires. ‚Tidily arranged‘ implies that each wire in the bundle should avoid crossing or tangling with others.
4. Štandardné, unshielded high-frequency wires should not be installed parallel to other wires.
5. Intermediate connections or joints are not permissible on internal wiring.