If it’s materials and labour Get the sparky to purchase conduit. If he purchases an excessive amount he can maintain the excess. Is the oven huge & industrial, just thinking why you would like 6mm2 cable, most domestic ovens might be wired in two.5mm2 or 4mm2. It is actually tough https://minitrunking91344.actoblog.com/28057357/a-secret-weapon-for-mini-trunking-accessories