c
General Electrical Contractors can take care of any electrical issues that may arise in your single family home. When it comes to large scale commercial and residential dwellings, you will need a commercial electrical contractor.
Electrical engineering is a large field. Certain jobs can be dangerous; others are not so dangerous. If you know what you're doing and are careful, the risks tend to be minimal.
"LCS" in electrical terms means the "load control switch." This type of relay is controlled by a remote and placed on several types of home appliances to supply large amounts of power, such as dryers and electric water heaters.
The telephone, the refrigerator, the light bulb. The Gramme Dynamo, which was the first invention to commercially develop electricity in large, commercial quantities.
HIRE AN ELECTRICAL CONTRACTOR. If you're not an electrician and you're thinking you can put in a 1200 amp service yourself, you can't. If you need to ask how, you shouldn't even be thinking you can. This is a large job which needs to be completed by an electrical contractor. Period.
Scientists use symbols for diagrams of electrical circuits for a simple reason; to save space. The actuall names of the components would take up immense space on the diagram.
the answer to this is Scale Drawing
Architectural Drawing; drawing of primarily buldings and using wood, concrete, and steel as materials. Structural/Bridge Drawing; detailing of structural steel and concrete materials. Machine Drawing; drafting products and details using metals and processes of all sorts and in their various forms, such as: formed, wrought, forged, and cast. Electrical Drawing; the making of wiring diagrams and harnesses used in buildings, ships, and machinery that use electromotive power and controls. Electronic Drawing: the drawing of primarily low voltage DC PC boards and controls. Graphic Drawing; the drafting of stylized 'pictures' to represent, or render, a concept. the technical aspect is in the drafting and not as much in details. Ship/Boat Drafting; an area of drawing using a large number of free-form shapes connected to form hulls and other parts of boats and ships. Airframe Drafting: the drawing of free-form shapes melding with many mechanical interfaces. This discipline requires a high degree of Mil-Spec knowledge.
They did not need them.
An example of electrical energy is large electric power plants generate for electrical energy.
Beam Compass.
The simplest answer is that working to a standard means that anyone can read the drawing. If there is no standard the symbols used on the drawing (weld type and size, surface finish, even the dimensioning of the components) would vary from one drawing (or draughtsperson) to another and cause confusion. Engineering drawings use a large number of symbols to denote operations and instructions (which reduces the time taken to draw them and the size of "paper" they're drawn on). Imagine the potential problems if one person used a symbol to mean "weld" and another one used the same (or similar) symbol to mean "do not weld".
No.
You need symbols on PFDs and PIDs because an exact drawing is more complex than necessary on those documents. Too much space would be occupied by the detailed sketch of something as simple as a valve, when all that those two documents need to show is what kind of valve, how large it is, and where in the process it needs to go.
A winch is a geared (lever advantaged) device that is used for drawing large weights. Often comprises a steel cable, hook and spool. Tow truck use a winch to pull a staled auto onto a trailer.
A voltmeter
Symbol Dictionary hosts a large database of information titled Symbols of the Ancient World. Additionally, there is a wiki page for Roman symbols that has a lot of information as well.