Equipment nameplates: where they go and when to use an engraved one

Walk into any pump room, mechanical room or electrical room and count the machines that look the same. Two pumps side by side, four rooftop units in a row, a lineup of drives. Equipment nameplates are how the next electrician, millwright or contractor tells them apart without opening a drawing. This post covers where they go, when an engraved one is the right call, what to put on it, and how to number a site so the plates, the drawings and the maintenance records all agree.

01What an equipment nameplate is

An equipment nameplate is an engraved plate fixed to a piece of equipment that tells people what it is on this site. The top line is the tag number, the same one used on the single line diagram, the P&ID or the mechanical schedule. Under that is a short name anyone can understand, and often a line of detail such as the voltage, the size, or the panel it is fed from.

Every motor, transformer and drive already leaves the factory with a rating plate. That plate tells you the horsepower, the frame and the serial number. It does not tell you that this is the raw water pump and not the backwash pump, and it says nothing about where the power comes from. The engraved nameplate is the site's half of the story, so the two always go together.

02Where equipment nameplates go

Anywhere there is a machine someone will need to find, isolate or work on. These are the rooms we cut nameplates for most often:

03When an engraved nameplate is the right call

Any equipment you want to find by name is worth a plate. An engraved one earns its place in these situations:

• The equipment comes in twos and fours. Duty and standby pumps, rows of rooftop units, a lineup of drives. Identical machines are where the wrong one gets locked out.
• The building is new or just renovated. Turnover is when tag numbers match the drawings exactly. Plates made from the equipment schedule lock that in for the life of the building.
• The equipment lives somewhere rough. Rooftops, boiler rooms, pump rooms and washdown areas are where printed labels fade and lift first. The text on an engraved plate is cut into the material.
• You run a maintenance system. If work orders go out by asset number, the asset number needs to be on the asset, in letters a technician can read from the doorway.
• The drawings call for it. Electrical and mechanical specifications commonly ask for engraved nameplates on equipment, often naming lamacoid or lamicoid by name.
• Someone new will walk in. Contractors, inspectors, insurers and the next maintenance tech all judge a site in the first minute. Matching engraved plates read as a maintained building.

04What goes on an equipment nameplate

Three lines cover almost every nameplate. Biggest first, so the tag reads from across the room and the detail reads up close.

The letter heights come from reading distance. A 1/2" tag reads from about 5 to 7 m, a 1/4" name from 2 to 3 m. Our letter height and size guide has the full table. A 3" × 5" plate gives room for a fourth line if the specification asks for one, such as a location or a second voltage.

05One tag number everywhere

The single most useful thing a nameplate does is repeat the tag number from the paperwork. When the drawing, the plate and the maintenance record all say P-101, a work order leads straight to the right pump and a lockout sheet names the right disconnect.

Most sites already have a numbering scheme in their drawings. If yours does not, these prefixes are common and easy to read:

Give the pump, its drive and its disconnect the same number (P-101, VFD-101, DS-101) and anyone can work out which three belong together without a drawing.

06Mounting and placement

• On the equipment, at eye level, facing the way people walk in. The plate should be the first thing seen from the access path or the doorway.
• On a fixed part of the casing. A frame rail or a fixed panel keeps the plate with the machine. Plates on service covers tend to get swapped around after maintenance.
• Beside the maker's rating plate, never over it. The rating plate is needed for parts and warranty. Yours goes next to it.
• Screws or rivets for heat, vibration and outdoors. Order the plate with screw holes and it goes on in two minutes and stays on. Rooftop units, boilers, pumps and compressors all suit screws.
• Adhesive back for clean, flat, indoor surfaces where drilling the casing is unwelcome, such as UPS cabinets, PDUs and finished enclosures.
• Thickness to suit the job. 1/16" sits flat and neat on a cabinet. 1/8" is stiffer and suits larger plates and rougher places.

07Equipment nameplate facts worth knowing

1. Two plates, two jobs. The maker's rating plate is the factory's record of the machine. The engraved nameplate is your site's record of what it does and where it is fed from.
2. The colour runs through the plate. A lamacoid is a two-layer laminate. The engraving cuts through the coloured surface into a contrasting core, so the letters are part of the plate rather than printed on it.
3. It does not conduct. Phenolic laminate is an insulator, which is why it has been the standard for tags mounted on electrical equipment for decades.
4. Black with white letters is the everyday choice. White with black letters suits light-coloured casings and rooftop units. Colour can also code a system, for example red for fire pumps. The colour guide lists the common combinations.
5. Specifications often name the product. Electrical and mechanical specs regularly call for "engraved lamacoid nameplates" on equipment, and the drawings set the wording. We engrave to what you send.
6. A whole building is one spreadsheet. The equipment schedule on the drawings is already a nameplate list: tag, description, and often the feeder. That is all we need to cut the set.

08What to send when you order

The fastest way to quote a building is to send the equipment schedule as it is. The Lamacoid Builder reads a spreadsheet in whatever layout it arrives in, and our post on ordering from a spreadsheet shows how. Or email the list to sales@llamacoids.ca. We cut in Burlington, Ontario, the same day, and ship Canada-wide.

09Common questions