1. IPC-2221 8.1.7 Mounting Over Conductive Areas Metal-cased components shall be mounted insulated from adjacent electrically conductive elements. Insulation materials shall be compatible with the circuit and printed board material. Conductive areas under the parts shall be protected against moisture entrapment by one of the following methods.

2. IPC-2221 8.1.7 Mounting Over Conductive Areas  Application of conformal coating using material in accordance with IPC-CC-830 (usually specified on the assembly drawing).  Application of cured resin coating by using low flow prepreg material.  Application of a permanent polymer coating (solder resist) using material in accordance with IPC-SM-840.

3. IPC-2221 8.1.7 Mounting Over Conductive Areas This requirement is applicable to components with or without sleeving (see Figure 8-3). Figure 8-3 Axial-leaded component mounted over conductors