How to Read an Electrical Floor Plan Drawing

How To Read Electrical Plans

Calibration of Reflected Ceiling Plans

Reflected ceiling plans should exist drawn at the aforementioned scale equally the floor plans. Depending on the complexity of the project and ceiling handling, the virtually common scale for residential and small commercial projects is i// = one'-0" (ane:50 metric) and V8" = 1'-0" (1:100 metric) for large commercial projects. The scale the ceiling plan is drawn at should exist noted and placed direct beneath the drawing, either side by side to or directly beneath the title. If an enlarged detail is needed to explicate a feature in the ceiling, it is keyed with a note or symbol to a separate, larger-scale drawing.

The luminaires should be drawn as simple rectangles, squares, or circles that depict the actual fixture every bit closely as possible. Simplistic forms prevent clutter in the view for ease of recognition. In most cases, the lighting fixture is drawn to the scale of the actual fixtures. However, in some cases such every bit miniature spotlights, the size may take to be exaggerated, as the properly scaled unit of measurement would be too small-scale to show up on the programme.

Partial REFLECTED CEILING Program

An enlarged particular of a coma shade is fatigued in section view and keyed to its location in the pocket-size-scale reflected ceiling plan.

Lighting fixtures are represented with symbols in the reflected ceiling programme and keyed to a legend showing specifications.

Drafting Standards for the Reflected Ceiling Plan

A reflected ceiling plan must clearly show all walls, partitions, and soffits that intersect with the ceiling. It should also specify changes in ceiling elevations and materials, such every bit lights, sprinklers, smoke detectors, and HVAC diffusers that attach to or penetrate the ceiling. In drafting reflected ceiling plans, the designer should reproduce the floor plan walls and openings such as doors and windows, simply without showing items such as built-in cabinetry, plumbing fixtures, etc.

The lighting fixtures and other electrical features shown on the reflected ceiling plan are given symbols that are keyed to a legend. It is advisable to draw in all the electrical symbols on the programme before it is dimensioned or notes are added. If not, a symbol may fall on top of a dimension, thus requiring the dimension to exist moved. Locate the low-cal fixtures in the ceiling plan in accordance with the lighting pattern concept. Common types of light fixtures on the lighting plan include surface-mounted, recessed, pendant, and track-mounted.

On commercial projects where there is a suspended ceiling, the reflected ceiling plans would show any partitions that extend through the ceiling plane also. The ceiling grid lines (chosen "T" bars) should also be shown. Other information included in the reflected ceiling program are the ceiling materials, ceiling heights, ceiling slopes, changes in ceiling heights, locations of all lighting fixtures (including exit and emergency lights), air dif-fusers and vents, access panels, speakers, sprinkler heads (if used), and other items that touch or are part of the ceiling plane.

Next, the interior designer should determine how the lights in the space are to exist switched. For residential or small commercial

Standard lighting and electrical symbols

The ceiling grid, besides equally lights and other items located within information technology, are shown to scale.

The ceiling grid, besides equally lights and other items located within it, are shown to scale.

The switching can either exist shown on the reflected ceiling programme or on the electric lighting plan. The switching pattern should exist based on how much individual control is needed and the function of the lighting. Free energy conservation needs and maximum circuit loads within the circuits will also determine the number and location of the switches. Generally, switches are located near the door or opening leading into the space. Large spaces that take more than one entry may crave multiple switching locations.

After locating the switches, decide which luminaires they should control and delineate this on the plan. This can exist done in two ways, depending on the size and complication of the lighting plan.

The first method is to depict a line from the wall switch to the fixtures it controls. This connecting line should be dashed and curved to distinguish it from other objects and items on the drawing. Curved lines are preferred, as direct lines may become mixed upwards with wall lines or other items that are fatigued in the plan. The connecting curved line should touch on the outlet or fixture symbol. The symbol for switches tin exist a uncomplicated South. If a particular lighting fixture is switched from two locations, the symbols will exist S3 to indicate that three items (two switches and one lighting fixture) are connected electrically.

The second method of showing lite-fixture switching is to assign a number or letter to the switch and to identify this same number in or almost the light fixture shown in the ceiling programme. This method is used primarily in commercial spaces, where there might be a lot of multiple switching and other items placed on the ceiling plan, so that the use of lines (the first method) could complicate the drawing.

After the interior designer lays out the lighting and switching, the drawing is given to an electric engineer, who indicates the exact circuitry, wire sizes, and other specifications required for the electrical organisation. In residential spaces, the drawing might exist given straight to the electric contractor, as the circuitry and requirements here are not as complex as those in commercial piece of work.

Designation of Materials

When preparing the reflected ceiling plan, the designer must call out types and locations of specific ceiling materials. This tin be done by placing notes on the plan, or symbols that are referenced to a ceiling cloth legend. The two almost common ceiling systems used are gypsum board ceilings that are fastened to the structure to a higher place, and suspended acoustical ceilings. Other ceiling finishes might include woods facing, linear metal, or even exposed wood joists and beams. Dimensioning Reflected Ceiling Plans

As the reflected ceiling plans are more often than not fatigued to a scale that matches the floor plans, there is no need for a lot of dimensioning on the plan, unless ceiling breaks or changes of materials occur where they are not obviously located at a door, wall, or column location. Every bit long as the reflected ceiling plan is drawn to scale, the dimensions of the spaces and structure can exist reserved for the flooring plan. Yet, in some cases, the sizes of the units and the fixture locations do need to be dimensioned. This is especially true for big expanses of gypsum lath ceiling, where the scale cannot be as easily determined as in a gridded suspended ceiling assembly (where, for instance, one can count units to locate the light fixture).

When dimensioning the reflected ceiling plan, either "finish" dimensions or "framing" dimensions can be used, but the choice must be noted on the plans. Elements such as recessed light troffers can be precisely located in the finished space. If a downlight in a gypsum wallboard ceiling is to be used, it by and large is dimensioned to its center indicate so the electrical contractor knows where to install

PARTIAL REFLECTED CEILING PLAN

sc: i/4"= r-o"

it. Alignment and direction of patterns might need to be dimensioned directly on the plan. In these instances, references should be given that are easily obtainable in the field. Dimensions should be referenced from the face of a wall, cavalcade, or imaginary centerline of a room, as illustrated in Figure 14-17.

The recessed down lights in this reflected ceiling plan are dimensioned in relation to each other and various wall elements and soffits.

Checklist for Reflected Ceiling Plans

General

• Title the cartoon, notation its scale, and identify n (or reference direction).
• If needed, develop a ceiling type fabric schedule and key it to the program.
• Develop a lighting symbol fable and locate it on the same sheet every bit the first reflected ceiling programme (if more than i is required), or on a nearby sheet.
• Make clean up the program (or in CAD, turn off superfluous information) so the walls, spaces, and fundamental codes are clear, dark, and very legible. Don't show items unless they are on the ceiling airplane or intersecting it.
• Describe in major soffits or openings above and call them out in a note, including attic access panels.
• Pouche walls, if applicable.
• Decide on the switching patterns of the light fixtures (if the interior designer has this responsibility) and show by the curved-line method or employ of numbers/letters.
• Cross-reference the reflected ceiling programme to other drawings (if applicable), carefully checking for accuracy and completeness of information.

Notations

• Annotation where the ceiling level changes or slopes if this has a direct effect on the light fixtures and their installation.
• Note special features, clearances, finished ceiling heights above finish floors, alignments, and other important items.
• Cross-reference the plan with symbols and reference to the lighting schedule, details, and other drawings every bit needed.

Dimensions

• Dimension the locations of low-cal fixtures and changes in ceiling types that are non readily apparent. Locate to such items as columns or existing walls.
• Dimension clearances, alignments, and other controlling factors.
• Dimension lighting coves and other structural lighting, or create large-scale drawings of these and cross-reference.

Electrical Plans

Electric plans can include electrical outlets, telephones, communication devices, and other items requiring electrical power. In pocket-sized projects, these items tin can be shown together with the lighting. An example of this type of drawing is illustrated in Effigy fourteen-18. On big commercial projects, the electrical program, often referred to every bit a ability or power/communication plan, shows the outlets and related electric devices separately (Figure 14-19). In most cases, the plumbing equipment and items such as cabinetry and other congenital-in items are shown in order to more than closely coordinate the location of electrical power devices. In some instances, such as in open-office situations, designers also prefer to show the furniture, as many times information technology relates directly to the electrical outlet locations (Figure fourteen-20). The interior designer prepares the power plan and and so forwards it to the electrical engineer to detail the circuitry, wire sizes, panel boxes, and other electrical specifications. On small residential plans, the cartoon is given straight to the electrical contractor to install the piece of work co-ordinate to accepted practices.

The telephone and other advice systems are also generally shown on the electrical plan. Locations of telephones, public address systems, computer terminals, intercommunication devices, and security systems are the responsibleness of the interior designer in consultation with specialists. The designer draws a ability/communications plan that schematically shows where power is needed for special equipment. Symbols for electric devices are more often than not keyed to a legend that is on the same sheet as the program. The electric engineer or other system specialists do most of the detailed specifications for these devices.

Electric 4 LIGHTING Plan

In big commercial projects, a divide electric/power plan with a legend specifies outlets and circuitry. Many architectural features and other systems are left out so that the electrical plan can be easily read.

A power programme often includes telephone and other communication devices.

In large commercial projects, a separate electrical/power plan with a fable specifies outlets and circuitry. Many architectural features and other systems are left out and so that the electrical programme can exist hands read.

Calibration of Electrical Plans

Electrical plans in commercial spaces are generally fatigued at the same scale every bit the floor plans. The most common calibration for commercial projects is V8" = fifty'-O" (1:100 metric). Even so, in complex installations, the scale might be increased to V4" = fifty'-O" (1:50 metric). The calibration the plan is drawn at should be noted and placed either adjacent to or directly beneath the title.

Drafting Standards for Electrical Plans

Electrical plans must show all interior and outside walls, stairs, and big devices, such equally furnaces, water heaters, etc., that crave power. Congenital-in fixtures and cabinetry, such as in bathrooms and kitchens, should also be fatigued to better locate the electrical outlets and other devices. The walls should exist fatigued with lighter line weights so they practise non dominate the drawing. Locate the convenience outlets on the walls where they are to exist mounted, and call out the dimension in a higher place the finished flooring (A.F.F.). Remember to note any special requirements such equally weatherproof (WP), split up-wired, or special-purpose connections. Common electrical symbols are shown in Figure 14-21.

Designation of Materials

Electrical plans are primarily diagrammatic. Although they are fatigued to a scale that matches the flooring plans, the electrical devices are often also minor to portray in the drawing at their verbal scale. They are drawn as an oversize symbol to be easily recognized. To proceed the cartoon elementary, materials such as cease flooring and other items are not delineated.

Dimensioning Electric Plans

Electric plans are drawn to a scale that generally matches the floor plans. There is no need for a lot of dimensioning on the electrical programme, as items can be located to scale on the floor plans. However, in some cases, electrical outlets and other devices do need to be dimensioned to accurately identify them where they can be easily accessed when the building is occupied. This is particularly truthful for large expanses of wall where the scale cannot be accurately adamant by scaling the cartoon. In such instances, references should exist given that are easily obtainable in the field, dimensioning from the face up of a wall, cavalcade, or imaginary centerline of a room. If a horizontal dimension is not given for a wall outlet, the electrician will identify it equally close as possible to the designer's plan. The electrician might choose to attach the outlet to a wall stud rather than locating it between two studs if the designer has non dimensioned a specific location.

Although well-nigh electric outlets do non need to be exactly located, there are some exceptions, such every bit in this bar surface area, where outlets must coordinate with equipment.

Fractional Electric Programme

Checklist for Electric Plans

Full general

• Title the drawing, note its scale, and identify northward (or reference direction).
• Championship the accompanying electric schedule and key it to the program.
• Add notes to analyze any abbreviations that are non commonly recognized.
• Make clean up the plan (or in CAD, turn off superfluous information) so the walls, spaces, and key electrical codes are clear, nighttime, and very legible.
• Cross-reference the electric plan to other drawings and schedules, advisedly checking for accurateness and completeness of information.

Notations

• Note special situations, such as devices supplied by owner or others.
• Annotation special features, clearances, outlet locations above finish floors, cabinetry, and other items.
• Note alignments and other important items that affect the electrical plan.

Dimensions

• Dimension location of outlets and changes in floor or wall types that affect the outlet installation.
• Dimension outlets to walls, wall corners or intersections, and other items such as columns.
• Dimension the appropriate outlets to the proper distance to a higher place the finished floor (A.F.F.).
• Dimension clearances, alignments, and other controlling factors.

The mechanical systems of a building are commonly referred to collectively as the HVAC (heating, ventilating, and refrigerate-ing) organization. The HVAC system ensures that the occupants of a building are provided with a comfortable surroundings. The organization does more than provide heating for winter and cooling for summer. It brings in fresh air, circulates it through the interiors, and exhausts stale air and odors. Information technology can also treat air to command humidity, dust, pollen, and other undesirable conditions.

The plumbing system in a building serves a number of dissimilar functions, such as delivering water to people and machines through pressurization (water supply), and ejecting water to be removed through gravity (drainage). Plumbing serves iii basic needs: it provides water for human consumption, sanitary drainage of wastes, and mechanical systems. H2o might exist used for equipment or serve an automated sprinkler arrangement, as discussed later in this chapter under plumbing plans. Some commercial buildings might also take a storm drainage system that rids the roof or other areas of rainfall or flooding. Such systems are carve up from the germ-free sewage piping and collect into a tempest sewer or are routed to a curbside drainage. A building might also have a waterfall characteristic, fountain, pond, or other decorative chemical element that has a specialized, recirculating water system.

Mechanical and plumbing drawings involve a lot of communication, coordination, and teamwork among the various blueprint professionals and the contractors. The professional offices that produce the HVAC and plumbing drawings must exist aware of one

Continue reading hither: O o o o o o

Was this commodity helpful?

poulinwithavercoad.blogspot.com

Source: https://www.northernarchitecture.us/construction-drawings/o-o-o.html