Is the bridge mounted above or below the water pipe? Is the top of the heating tube below?
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ABC and other short circuit. Meter box (power) will form a large current, the wire can turn red, burn the insulation skin fire. At the same time, the battery short circuit, can also produce high current, burn the wire, ignite the battery car. (Paint, lubricants, foam seats, plastic decorative panels, etc. are flammable) charging, the current is relatively large, may be too long extension line, the first fever, insulation skin rupture, copper short circuit. Both sides will be short-circuit, causing a fire. Public security departments have scientific research, professional and rich experience. Will make the right to meet the scientific identification of the scene.
Red, green, yellow, blue, yellow and green, red, green and yellow is a three-phase line of fire, blue is the zero line, yellow and green is the ground, your home switch red fire line, the rest is the control line, Socket red is the line of fire, green is the zero line, yellow should be ground. It is best to find a professional to see