Monthly Archives: July 2011

Junction Box, Switch, two or lunch box – the box should be used?

These are all different types of electrical boxes (except lunch, of course). The location and type of cabling that is taken will determine which type of box used. Lunch will be used after the job is done. Before entering into certain types of boxes, let’s review some of the things that are applicable to all types of electrical boxes.

* All electrical connections must be contained in an electrical box. The box shields the building material and other flammable materials in the case of electrical sparks.

* All boxes must be accessible. Never cover a box with plaster wall coverings, paneling or other.

* If an electrical junction box is spliced ??and the only son of a device such as a switch, should be covered with a white cap.

* An electrical box should be installed flush with the front edge of the finished surface of the wall or ceiling. If the space between the finished surface and the edge of the box is greater than 1 / 8 “and an extension of the box should be installed.

* Make sure your box is deep enough to avoid overloading the child. It should be deep enough for a switch or can be installed easily without crimping or damage to the child. Electrical codes to determine how the son of what size each size of box can accommodate based on the cc capacity of the box. For example, a # 14 wire occupies 2 cubic inches and a # 12 wire occupies 2.25 cubic inches. During the child count, the count of the device or device such as a cable. It is always safer to use a large box unless you have no place in the wall or ceiling.

Electrical boxes come in different materials and shapes. By becoming familiar with different types of boxes, which will be able to select the box next to your project home wiring.


Inside the boxes are usually plastic or metal.


* Electrical plastic boxes are the most widely used boxes for indoor residential wiring. They are cheap and easy to install. However, since you can not be the basis of a plastic box, so some local codes do not permit or only allowed for certain uses. Check with your local building department before using a plastic box.

* Some plastic boxes have holes W / TABS round. These boxes have not been integrated clamps so the cable is held in place by the box. You must use tweezers and basic cable within 8 inches of the box if you use this type of box.

* Plastic boxes are easier to damage than metal boxes, to buy extra boxes just in case. Never install a broken box.

* Most are brittle, not used in those who are not integrated into the wall. The exception is an outer box of extra strong PVC.

* Do not use with large lamps and fans. Some plastic containers are nails anchoring the box picture frames.


* Cans power is stronger and provide a connection to the soil more plastic boxes.

* The cans should be based on the grounding circuit. Connect the earth circuit of the child in the box with a green wire nuts and wire braids or a clip on the floor.

* The cable entering a metal box should be blocked.

* “Offense” boxes can be dismantled and ganged together to give rise to two or more devices.


* It is sometimes called old job or cut into squares.

* Remodel electrical boxes are used when running cable to install new equipment in an old wall.

* Plastic remodel boxes have “wings” and metal cans have clips or the shape of the ears that hold the wall extensible folding.

Outdoor boxes are usually molded plastic and aluminum smelting.

Molded Plastic:

* These boxes are used with PVC conduit in outdoor wiring and exposed wiring inside.

Cast aluminum:

* These are required for outdoor installations connected with a metal conduit.

* They have sealed seams and threaded openings to keep moisture.


Rectangular (2 “X3”) The name “One-Gang”

* These fields are used for switches and sockets.

* A bunch of boxes may have detachable sides that allow them two pictures together to form bands.

Squares (4 “x 4”) The name “Four-Square”

* “Plaster Rings” are used as adapters to accommodate the following configurations: a single band, gang of two or three inches around four inches.

* When a square box is used only for splicing cables, called an electrical junction box and a white cap should be used.

Name octagonal “Three-0”:

* Contain wiring connections of ceiling lights.

* Some octagonal electrical boxes have extendable braces to fit any space between the joists and are nailed or screwed to the frames.

While selecting the appropriate box for your electrical project will help ensure the success of their wiring, electricity, and always follow safety precautions. Never work on live circuits. Before starting work, the circuit must be identified and turned off the sign, marking, so that others know that work is done in this circuit. Confirm that the computer is turned off with a voltage tester. Electrical work must be performed by a confident, experienced or a licensed electrical contractor.

More information on electrical boxes can be found in section Ask the junction boxes

Rongey Dave is a licensed electrical contractor with over 35 years of experience. It is also an avid Do It Yourself. Over the years Dave has seen many DIY projects that caught fire and security. Visit Dave at Ask The Electrician for electrical project guides with photos, allowing you to enhance the beauty and value of your home safely.

How to solve “The RPC server is unavailable” easily

Have you ever met the error message: “The RPC server is unavailable”? Despite a common misconception, most users do not know what it is and how to correct it. RPC is a term that stands for remote procedure call. Acts as a liaison between the system and the server.

“The RPC server is unavailable” error message when the computer can not connect to the server. Various causes can lead to this error, virus attack, firewall, proxy settings and recording defects.

Once the computer displays the error message, make sure the firewall settings are disabled in some firewalls may prevent communication between the computer and the server. The link may be broken by anti-virus security installed on it. Just turn off the security installation and see if it makes a change.

Another thing to consider is whether the tunnel DCOM is enabled. To enable DCOM tunnel, go to Start, then Run. Write DCOMCNFG and click Component Services. Component Services, go to My Computer and select Properties. After that, turn to the Default Properties tab, then enable DCOM. Once you’ve done that, go to tunnel TCP / IP and click “Upload” and bring it to the top of the list. Once done, restart the computer and see that “The RPC server is unavailable” is resolved.

What is the Routing Switch, and when should you use?

Recently routers and switches used as devices for complete independence. But technology is constantly advancing, and more room requirements. Therefore we can see a trend to the functionality of these two devices into one.

First, look at the idea of ??Layer 3 switching. With the rapid development of technology had not appeared at the request of the device, which can combine high performance switching and “intelligence” of the router. It was inefficient to implement router in the topology of the network routing is required, but its use was rare. On the other hand, the routers use routing protocols to high-level results in poor performance and high consumption of resources. Considering these aspects, the decision to design new devices have been approved.

On the mode of application, Layer 3 switching, there are two types of switch router:

Switch Routing.
Changing the router.

In this paper the main features of the route change will be discussed. Routing switch is a switch that operates at the data link layer of the OSI model, but has some improvements for use as a router in the network layer. To determine the shortest path, routing switches based software does not use routing protocols such as RIP or OSPF. On the contrary, they have specialized equipment to implement different research methods and record the routing information. For example, the so-called MLS (multilayer switching) was developed by Cisco to provide multiprotocol data transmission over an ATM network, and this method is used for routing switches. It is important to understand that routing switches are intended to be used only for routing between VLANs (no support WAN).

The main features of Routing Switch:

It has 24 Ethernet ports and does not support WAN interfaces, unlike the routers.
Switches and routes much faster than traditional routers.
Form broadcast domain and act as a switch in the same network.

There are many other specific routing switches. One is a wireless router computer can also function as an access point. In this case, you get literally “three for one”:

an access point for wireless transmission of data.
a switch for connecting computers on a network.
a router for external access.

So when you must use the routing switch?

When you have a network with many machines that produce a large amount of broadcast messages.
When VLAN in the network and you want to improve performance.
When you need the highest level of network security VLAN implementation.
When it is not reasonable to use a standard router due to high costs and poor performance.

Taken and the detector wire with Romex

That can locate a 12 “above the ground. Install your top selling points if you want. Change often go 48” on the ground, but this can vary as needed. We assume that the device is mounted on a surface and is in the center of the room.

Buy 4 “outlet boxes with Romex Romex clamps.” Also buy a “light box is Romex Octagon” with Romex clamps installed. One box contains small Romex staples or clips that will be your anchor Romex cable in the box. They also buy or 14-2 Romex wire 2.12 GT or cable. It comes in 50 feet, 100 feet or even 250-foot rolls. Consider the addition of about twice what you think first you need. I suggest you start your FT 250.

Remove one of the tabs of each Romex boxes so you can slide the cable in the box.

With masking tape, mark a line on the front of each position along the wall where you want the outlets to be anchored. Mark the front of the mother when the switch is going too.

Using 16d nails and hammer box, anchor box comes with two nails on the side of the box and bolt. Add 1 / 2 “to put the box in front of the bar so that you will end up flush with the drywall, usually 1 / 2”.

The anchor light box in a room with 2 x 4 is installed between the joists or trusses. Align so that also sticks for about 1 / 2 “of the beam.

Run a piece of wire Romex box each other and allow approximately 6 – “. Paste for each case of drilling 5 / 8” 8 hole in the center of each post with a little wood, so that can happen Romex through. Also run one of the son of the light switch on the light box in the ceiling.

General Information on ISDN

ISDN (Integrated Services Digital Network) is a telephone network to transmit at high rates, more data and information from the phone line. Whereas before the phones can send voice messages, it is now possible to transmit video, images and other types of data being digital, the quality is superior to analog devices.

An overview of ISDN infrastructure

ISDN uses two channels to transmit the data it receives, Channel B and Channel D.

Channel B, or bearer channel is used for the actual sending of information, while the delta channel (D channel) is primarily for operations and control signal. However, depending on the configuration, can also be used to send data.

The network interface consists of two elements, the basic access interface (BRI) and Primary Rate Interface. Also known as basic access and primary rate access.

Basic Rate Interface

BRI has two bearer channels with a bandwidth capable of transmitting data at speeds of up to 64 bits / s and a channel with a delta 16 bits / s. The BIS also known as 2B + D.