are switches in bx wire electric box grounded AC cable (aka BX cable) in its current form, does not have a grounding conductor, but does have an internal bonding strip. MC cable in its current/normal form, does have a .
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0 · metal box bx cable grounding
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The complete grounding path was not always part of its use, as an exception in the Code allowed ungrounded lengths of BX to be used to extend ungrounded wiring methods such as Knob and Tube when adding an outlet or a switch.
there is BX cable for the heater, but there is no ground wire. the instructions say i must connect the ground wire to the green screw. the place is about 30 years old, if it matters. To correctly ground the BX cable or Romex you'd want to replace the non metal box with a metal one. The BX cable can be grounded to the metal box with a connector similar to the one shown below.Only metal boxes need to be grounded. However, the grounding wires in a plastic outlet or switch box should not be cut back so short that they are challenging to work with. You must allow .
Grounding is one situation where you must use the correct box. Metallic-sheathed cable (sometimes called BX cable) is grounded via its sheathing (NM or plastic-sheathed cable . AC cable (aka BX cable) in its current form, does not have a grounding conductor, but does have an internal bonding strip. MC cable in its current/normal form, does have a . BX cable is required when a metal box must be grounded to the cable's sheathing—NM cannot do this. Also, BX cable can be installed in some exposed locations, Learn the origins of BX cable, where to use it, its pros and .
The problem, of course, with a two-wire circuit is that it's not grounded. The old Romex (NM) and BX (AC) cables had no separate grounding conductor, or the conductor was so small (16 or 18 AWG) that it wouldn't count . You should be using the green conductor in the BX to extend the grounding to the new box(es). Most outlets/switches are self grounding; but some jurisdictions require . Looks like a BX switch loop. Confirm with a tester that the box is grounded, you should get 120v between the feed-in and the box itself. In any case, a switch with a metal yoke . The complete grounding path was not always part of its use, as an exception in the Code allowed ungrounded lengths of BX to be used to extend ungrounded wiring methods such as Knob and Tube when adding an outlet or a switch.
there is BX cable for the heater, but there is no ground wire. the instructions say i must connect the ground wire to the green screw. the place is about 30 years old, if it matters. To correctly ground the BX cable or Romex you'd want to replace the non metal box with a metal one. The BX cable can be grounded to the metal box with a connector similar to the one shown below.Only metal boxes need to be grounded. However, the grounding wires in a plastic outlet or switch box should not be cut back so short that they are challenging to work with. You must allow enough slack so that all wires in an electrical box are at least six inches (150mm) long (Article 300.14).
Grounding is one situation where you must use the correct box. Metallic-sheathed cable (sometimes called BX cable) is grounded via its sheathing (NM or plastic-sheathed cable uses an internal copper wire for grounding). So, metallic-sheathed cable must contact a metallic box for proper grounding.
AC cable (aka BX cable) in its current form, does not have a grounding conductor, but does have an internal bonding strip. MC cable in its current/normal form, does have a grounding conductor. Both are acceptable typically for grounding in their current form.
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Switches are optional* receptacles aren't unless self grounding. The receptacles need a reliable ground which is not provided by a regular receptacle. *IIRC switches need a ground wire if the cover plate is metal and it isn't self grounding.
BX cable is required when a metal box must be grounded to the cable's sheathing—NM cannot do this. Also, BX cable can be installed in some exposed locations, Learn the origins of BX cable, where to use it, its pros and cons, and how to work with it. You don't need a wire to ground the switch, the mounting screws satisfy the requirement when used with metal boxes, and there is an exception that allows you to not satisfy grounding requirements if no grounding means exists for replacement switches. The problem, of course, with a two-wire circuit is that it's not grounded. The old Romex (NM) and BX (AC) cables had no separate grounding conductor, or the conductor was so small (16 or 18 AWG) that it wouldn't count by today's code. This type of cable can usually be identified by the sheathing, which looks like snake skin or tarred cloth.
The complete grounding path was not always part of its use, as an exception in the Code allowed ungrounded lengths of BX to be used to extend ungrounded wiring methods such as Knob and Tube when adding an outlet or a switch. there is BX cable for the heater, but there is no ground wire. the instructions say i must connect the ground wire to the green screw. the place is about 30 years old, if it matters.
metal box bx cable grounding
To correctly ground the BX cable or Romex you'd want to replace the non metal box with a metal one. The BX cable can be grounded to the metal box with a connector similar to the one shown below.
Only metal boxes need to be grounded. However, the grounding wires in a plastic outlet or switch box should not be cut back so short that they are challenging to work with. You must allow enough slack so that all wires in an electrical box are at least six inches (150mm) long (Article 300.14). Grounding is one situation where you must use the correct box. Metallic-sheathed cable (sometimes called BX cable) is grounded via its sheathing (NM or plastic-sheathed cable uses an internal copper wire for grounding). So, metallic-sheathed cable must contact a metallic box for proper grounding.
AC cable (aka BX cable) in its current form, does not have a grounding conductor, but does have an internal bonding strip. MC cable in its current/normal form, does have a grounding conductor. Both are acceptable typically for grounding in their current form.
Switches are optional* receptacles aren't unless self grounding. The receptacles need a reliable ground which is not provided by a regular receptacle. *IIRC switches need a ground wire if the cover plate is metal and it isn't self grounding. BX cable is required when a metal box must be grounded to the cable's sheathing—NM cannot do this. Also, BX cable can be installed in some exposed locations, Learn the origins of BX cable, where to use it, its pros and cons, and how to work with it. You don't need a wire to ground the switch, the mounting screws satisfy the requirement when used with metal boxes, and there is an exception that allows you to not satisfy grounding requirements if no grounding means exists for replacement switches.
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are switches in bx wire electric box grounded|electrical box grounding screw