Principais Símbolos Na Elétrica Predial e Residencial

Summary

In this video, the speaker introduces the essential electrical symbols used in project diagrams, focusing on lines, circles, and triangles. He explains the meaning behind each symbol, such as conduits, switches, outlets, and light points, and their variations in terms of placement and configuration. The speaker also covers how to represent multiple wires, outlets, and switches within a single conduit. This educational content is aimed at helping viewers understand electrical symbols for effective project design and execution, making it a valuable resource for students and professionals in the field.

Takeaways

• 😀 The video explains basic electrical symbols: line, circle, and triangle, and their variations.
• 😀 A single line in a project symbolizes a conduit, while a dotted line represents a conduit underground.
• 😀 A solid line indicates a phase wire, while an 'L' upside down represents the neutral wire, and a line with a small top mark represents the ground wire.
• 😀 Multiple symbols on a line indicate that the line is a conduit carrying multiple wires, such as phase, neutral, return, and ground.
• 😀 The circle symbol represents a light point: a circle with a smaller one inside shows an embedded light, while a regular circle represents a ceiling-mounted light.
• 😀 The circle symbol can also be divided into three parts, indicating the lamp's power, the switch controlling it, and the circuit it belongs to.
• 😀 A circle with a line next to it represents a switch, and the number of divisions in the circle indicates whether it's a single, double, or triple switch.
• 😀 The triangle symbol represents an electrical outlet, and its variations indicate the height at which the outlet is installed, ranging from floor level to about 2 meters high.
• 😀 The triangle can also represent a floor outlet, with a square inside indicating a passage for the outlet in the floor.
• 😀 Outlets can be shown in pairs or in different sizes and heights, indicating their installation within the same conduit or circuit.

Q & A

What does a simple line represent in an electrical project diagram?

A simple line in an electrical project represents a conduit passing through a wall or ceiling.

What does a dashed line symbolize in an electrical project?

A dashed line indicates that the conduit is underground or below the ground level.

What does a solid line with a phase symbol represent?

A solid line with a phase symbol represents a phase wire in the electrical system.

What does an 'L' shaped symbol, pointing downwards, indicate in the diagram?

The 'L' shaped symbol pointing downwards represents the neutral wire.

How is the earth wire represented in the electrical diagram?

The earth wire is represented by a symbol with a line above it.

What does the line with a small dash on the top symbolize?

A line with a small dash on the top symbolizes the return wire.

How are multiple wires within the same conduit represented?

When multiple wires are inside the same conduit, the diagram shows a line with different symbols representing the various wires, such as phase, neutral, return, and earth wires.

What does the circle symbol represent in an electrical project?

The circle symbol represents a light point. If the circle is larger, it indicates an overhead light point; if smaller, it represents an embedded light point.

What do the three sections in a divided circle indicate?

The three sections in a divided circle provide information about the light's power, the switch controlling it, and the circuit it belongs to.

How is a switch represented in the diagram?

A switch is represented by a circle with a line or lines indicating the type of switch. A simple line indicates a single switch, two lines represent a double switch, and three lines represent a triple switch.

What does the triangle symbol represent in the diagram?

The triangle symbol represents a power outlet or socket. Variations in the triangle's shading indicate the height of the outlet from the ground.

How do variations in the triangle's shading affect the representation of outlets?

A completely unshaded triangle represents an outlet at around 30 cm, a partially shaded triangle indicates an outlet between 1.20 and 1.30 meters, and a fully shaded triangle represents an outlet at around 2 meters.

What does a triangle with a square inside represent?

A triangle with a square inside represents an outlet that is embedded in the floor.

How are multiple outlets represented in a single diagram?

Multiple outlets can be shown in a diagram by placing two triangles in front of each other or side by side, indicating they share the same conduit and possibly different heights.

What does the combination of a light switch and outlet in a single conduit represent?

When a light switch and an outlet are shown in the same conduit, it means the wires for both are running together in the same conduit, but may be at different heights.