Greg, Thanks for stepping in.
Your point re preferences is important and I think our NCOP guidelines need to accomodate these preferences as there is more than one way to skin a cat. Mandating one option at the exclusion of others and then not even enforcing existing requirements leaves safety the loser.
Let me chew over the status quo and leave advancements for a moment...
Compliance with existing NCOP14 seems to be non existant in some areas so it is hard to move to a higher safety standard.
Greg, non insulated terminals are not an option at any time in any way under the existing regs. There is no compromise available here so you don't have to worry about making that choice !
Please Guys don't make this simply an electrically ground / isolate debate. I only put that one in to show that electrical isolation is not the only option and there are VALID arguments for and against, however neither is safer and I would prefer NCOP14 to suggest / require some of the other safety points 1-7 listed above.
Back to NCOP14....
NCOP14 sect. 2.6 'Controls' says the master switch must isolate all electrical connections to the power source.
To me, this askes for a dual pole switch breaking both +ve and -ve from the battery pack not just one or the other. i.e the word used is 'all'.
(Personally I would never bring both into the same switch anyway)
This is not what people are doing now, so is this compliance ?
NCOP14 2.7 .... ' All electrical control apparatus, the motor and major ventillation system components must be effectively sealed or otherwise resistant to water and dust ingress.'
I see non compliance.
'All electrical installation work must be designed and executed in accordance with acceptable codes and standards. All power unit wiring and connections must be insulated (double insulated if appropriate) and provided with adequate mechanical protection.'
I see non compliance.
On the topic of electrical insulation / isolation...
Births, deaths and insulation failure. They are all realities of life.
EVs must be tollerant by design, as best can be, of insulation failure.
Consider your electrical system. Imagine insulation failure at any point. How will it cope ? How safe will it be ? Will it shut down ?
There seems to be general support for leakage detectors.
Once you get a leakage detection, what are you going to do with the information.
One battery line (+ve ?)
Both batter lines ?
All available contactors ?
What will be the reset options ?