I'm not overly keen on trusting the Rona 'expert' so i thought i'd tap the knowledge base here! Just purchased the individual 10-gauge RW90 cable for burial in my conduit run to the garage. They only had the Red, Black and White. The Electrical guy said it s ok with code to go one gauge lower for the ground wire and sold me 12 gauge green. Is this in fact meeting the CEC?