silikonlegal.blogg.se - Dimensions of a single gang plaster ring

Dimensions of a single gang plaster ring full#

If a receptacle has #12 wire connected to it, a volume allowance of 2 x 2.25 or 4.5 cubic inches must be made. For example, if a switch has #14 wire connected to it, a volume allowance of 2 x 2.0 cubic inches or 4 cubic inches is required. Each device or equipment is considered individually where more than one item is contained in the box. For each yoke or strap containing one or more devices or equipment, a double volume allowance is required for each yoke or strap.The hickey is no longer popular and has been replaced with hanger straps that are fastened to the box. A hickey is a fitting that can be described as a coupling that has threads the same size as the fixture stem and has an oval-shaped hole on one or more sides for the fixture wires to exit inside the box. A fixture stud is a fitting that mounts to the top of the box, usually inserts through the knockout of a metal box and is threaded to accommodate the fixture stem. Where one or more fixture studs or hickeys are present in the box, a single volume allowance is required to be made for each type of fitting in the box.No allowance is required for small fittings like locknuts and bushings.A calculation must be made of the cubic inch capacity that is required where conductors of different sizes are installed as in section 314.16(b) Box Fill Calculations. This number of conductors permitted in various boxes, as shown in the Table, applies only where all conductors are the same size.The minimum cubic inch capacity for each size is given along with the maximum number of conductors of sizes #18 through #6 that are permitted in the box.

A “standard” box is one that is included in the Table.

The NEC Table 314-16(a) covers the maximum number of conductors permitted within a standard metal box.

Where practicable, an extension ring that is the same shape as the box can be installed that will add adequate space so the original box does not have to be replaced.

Sometimes more conductors end up in boxes than were originally intended.

The box must have a cubic-inch capacity that equals or exceeds the total of the contained items. The cubic inch area required for each wire, clamp, support fitting, device and equipment ground is added together.

The total volume determines the number and size of conductors and wiring devices that are permitted to be contained in the box.

Boxes described in Table 314.16(A) that have a volume larger than is designated in the table shall be permitted to have their volume marked as required by this section.

Boxes 1650 cm3 (100 in.3) or less, other than those described in Table 314.16(A), and nonmetallic boxes shall be durably and legibly marked by the manufacturer with their volume.

The volumes of standard boxes that are not marked with their volume shall be as given in Table 314.16(A).

The same kit may also be adhered directly to the glass or any other smooth surface. When a suitable wall surface is not available, the SSW can be mounted to the mullion of an interior glass wall, window, or partition using the optional SSW-MUMK Mullion Mount Kit (sold separately). Cresnet allows for daisy-chaining multiple SSW hallway signs using a single cable. For custom applications, a Cresnet cable (sold separately) can be run to a control system up to 3000 feet (914 meters) away. For typical room scheduling applications, a six foot (1.83 meter) USB cable is included, which connects to the touch screen mounted below. Power and communications are supplied by a single USB or Cresnet wire.

It mounts to the wall over a standard 1-gang electrical box or plaster ring.

Engraving can be changed at any time by purchasing a replacement sign face (model SSW-ACR). When illuminated, the engraving is clearly visible at a distance of 50 feet or 15 meters. The engraving appears on both sides of the acrylic sign face to identify the room by name or number. The SSW is available with or without custom engraving. The control system can be programmed to support all types of functionality, enabling colors to alternate, fade in and out, or blink on and off as desired. Custom RGB color mixing requires the SSW to be connected to a Crestron control system via Cresnet®.

Dimensions of a single gang plaster ring full#

Its tri-color RGB LEDs allow for a full spectrum of colors by blending the red, green, and blue elements in 1% increments per color. The sign illuminates green when the room is available and red when the room is occupied.įor custom applications, the SSW can be programmed to illuminate in any desired color. The sign color is controlled by the room scheduling application, which runs on the touch screen and syncs with the Crestron Fusion® Enterprise Management Service. No special programming or configuration is required. Business Apps/ Instant Messaging Platformįor room scheduling applications, the SSW simply connects to a Crestron TSW-760 or TSW-1060 touch screen via USB.