Doesn't really apply to 12V, but worthy of mention:
Ten Commandments of Electrical Safety
(1) Beware of the lightning that lurks in an undischarged capacitor lest it cause thee to be bounced upon thy backside in a most ungainly manner.
(2) Cause thou the switch that supplies large quantities of juice to be opened and thusly tagged, so thy days may be long on this earthly vale of tears.
(3) Prove to thyself that all circuits that radiateth and upon which thou worketh are grounded lest they lift thee to high-frequency potential and cause thee to radiate also.
(4) Take care thou useth the proper method when thou taketh the measure of high-voltage circuits so that thou doth not incinerate both thee and the meter, for verily though thou hast no account number and can be easily replaced, the meter doth have one and as a consequence bringeth much woe upon the supply department.
(5)Tarry thee not amongst those who engage in intentional shocks for they are surely non-believers and are not long for this world.
(6) Take care thou tampereth not with interlocks and safety devices, for this incureth the wrath of thy seniors and bringeth the fury of the safety officer down upon thy head and shoulders.
(7) Work thee not on energized equipment, for if thou doeth, thy mates will surely be buying lunch without thee and thy space at the table will be filled by another.
(8) Verily, verily I say unto thee, never service high-voltage equipment alone, for electric cooking is a slothful process, and thou might sizzle in thy own fat for hours on end before thy Maker sees fit to end thy misery and drag thee into His fold.
(9) Trifle thee not with radioactive tubes and substances lest thou commence to glow in the dark like a lightning bug.
(10) Commit thee to memory the works of the prophets, which are written in the instruction books, which giveth the straight info and which consoleth thee, and thou cannot make mistakes.
-From Orbit, the Journal of the Rutherford High Energy Laboratory, Didcot, England (31 January 1965) p.12
There are several versions of this on the web. I was first introduced to it by a retired Cutler-Hammer EE who taught me to teach electrical motor controls. I especially like #8.
Jim, "Isn't rise and shine an oxymoron?"
'06 Tiger CX 'C Minus' on a Silverado 2500HD 4x4, 8.1 & Allison (aka 'Loafer's Glory')
