关于 ELECTRICAL BOX

tomcat

请问有经验的电工， 地下室四周墙需要使用需要使用 "airtight  electric box"  还是和内墙一样的普通 electric box   .

hushanhe

Just for your reference:  

If both sides of the wall are inside house, you can use the regular box, but if one side wall is inside the house and the other is outside, then you will find there is insulation at inside wall, you have to use the regular box with vapor barrier or air tight electric box to keep the moistrue away.

fujian

tomcat