Except for underground box covers that weigh over 45 4 kg 100 lb doors and covers of enclosures used solely as pull boxes splice boxes or junction boxes shall be locked bolted or screwed on.
Low voltage junction box requirements.
Keep low and line voltage apart i often see two gang boxes installed with a cable or phone jack in one half and a 120v outlet in the other.
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Those requirements are in 314 28 and they apply to all conductors 4 awg and larger fig.
If an exposed conductor of a low voltage wire comes in contact with 120v the higher voltage can damage what ever is at the end of the low voltage wire.
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Sufficient space shall be provided and maintained about electric equipment to permit ready and safe.
Electrical codes generally require that all electrical devices and the wiring connections to those devices must be enclosed in an approved electrical box often known as a junction box this metal or plastic box includes a cover to protect the wiring within and protect you from the wiring.
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Ent smurf tube with splices in junction boxes.
Personally i would prefer them to be in conduit e g.
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This rule is demonstrated nicely by wall switches receptacles and standard light fixtures all of.
A solid connection between the exposed.
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1 to illustrate how these requirements prevent conductor insulation damage let s consider two extremes in a straight pull situation.
Just like with electrical wires it will protect them from damage while providing accessibility for splices.
The sizing requirements for pull boxes junction boxes handhole enclosures and conduit bodies exist to prevent conductor insulation damage.
Junction boxes provide a safe grounded fireproof enclosure preventing wire nuts from coming loose and causing a short and possible electrical fire.
This lo pro junction box is one example of how to separate high and low voltage wiring within the same enclosure.