Searching online, you find varying opinions, with little evidence. Eg most are insulated; most aren't; it's an issue of not being insulated enough to prevent arcing; in case of fault, insulation may burn away due to high current etc. I'm not sure what to believe.
Searching online, you find varying opinions, with little evidence. Eg most are insulated; most aren't; it's an issue of not being insulated enough to prevent arcing; in case of fault, insulation may burn away due to high current etc. I'm not sure what to believe.