Brass Combination Plates: Switch and Outlet on One Plate

A brass combination plate is one solid brass cover with two different openings, so a single 2-gang box can carry a switch and an outlet behind one plate instead of two. Studio Timeless makes three of them: toggle plus duplex outlet, rotary dimmer plus toggle, and rotary dimmer plus decorator. All three measure 4.56 by 4.70 inches.

In short

• Three combinations, all 2-gang, all 72 dollars in the lacquered finishes.
• Plate size 4.56 in by 4.70 in by 0.080 in of solid brass, no plating.
• Four screws per plate: two per gang, 1.97 in long with a 0.28 in slotted head.
• A combination plate is a cover only. It does not include the switch or the outlet.
• The openings are cut at manufacture. A rotary hole cannot become a toggle slot later.

What a brass combination plate actually is

A combination plate is a cover plate whose two gangs have two different cutouts. The American convention is one plate, one opening type, repeated across the gangs, so a two gang plate normally carries two identical openings. A combination plate breaks that symmetry on purpose, because real walls rarely hold two identical devices. Ours are cut from a single piece of solid brass at a full 0.080 inch thickness, so the plate has weight in the hand and does not oil can when the screws are tightened. The category that governs this kind of part in North America is covered by UL 514D, the standard for cover plates for flush mounted wiring devices.

The three combinations we make

Studio Timeless currently offers three combination plates, and all of them are two gang.

The full set lives in the brass combination plates collection, which sits inside the wider wall plates and outlet covers range.

The four opening types, and why they never interchange

Every American wall plate opening belongs to one of four families, and a plate is defined by which two it carries. The toggle opening is a narrow vertical slot for a classic flip switch. The decorator opening is a large rectangle, the one a rocker, a GFCI or a USB receptacle needs. The rotary opening is a plain round hole for a dimmer shaft. The duplex opening is the figure eight for a standard two socket receptacle. The device dimensions behind those shapes are set by ANSI/NEMA WD 6.

These are not adjustable. Brass is cut once, and an opening sized for a rotary shaft has neither the width nor the height to become a toggle slot. This is the single most common reason a plate goes back: the device on the wall was changed after the plate was ordered. Decide the devices first, then the plate.

Plate dimensions, in inches

All three combination plates measure 4.56 in wide by 4.70 in tall by 0.080 in thick. That is marginally larger than the 4.5 inch nominal width of a standard American two gang plate, and the extra margin is deliberate: it swallows the ragged edge of a rough opening rather than exposing it. On plaster this matters more than on drywall, because a plaster opening is almost never cut to the box.

If your device sits more than an inch behind the wall surface, no plate screw of any length will reach it cleanly. That is what the brass screw extensions are for, and longer 1.5 inch brass screws cover the middle cases. Both live in the screws and extensions collection.

A combination plate is a cover, not a switch

This is the point that costs the most time in our inbox, so it is worth stating plainly. A combination plate ships as a plate and four screws. The switch, the dimmer and the receptacle behind it are separate devices that you or your electrician supply and wire. Buying the plate does not electrify the wall.

If you want the devices from us too, they are sold separately: the solid brass duplex outlet, the brass GFCI outlet and the USB-A and USB-C charging outlet all sit in the brass electrical outlets range. Which one belongs where is the subject of our guide to duplex, GFCI and USB-C outlets compared.

Combination plate or integrated unit? The fork in the road

Studio Timeless sells two families that look related and are not. The plates are covers for standard American devices. The switches, by contrast, are integrated one piece units: the brass face and the mechanism are a single assembly, so there is no separate plate to buy and no separate plate to lose. The American habit of buying a device and a cover separately does not apply to them.

So the decision is simple. If you are keeping the devices already in your wall and only want the brass to show, order a plate from the wall plates collection. If you are replacing the device itself, you are shopping the switches and outlets range instead, where an item such as the 1-gang knurled toggle light switch arrives complete. The two ranges are compared in detail in our article on Knurled and Retro Toggle, and the sizing logic behind every plate is set out in brass switch plates and outlet covers: sizing and gangs.

Screws: two per gang, four per combination plate

A combination plate takes four screws, not two. The count follows the gangs, not the plate: one gang takes two screws, so a two gang plate takes four, a three gang takes six, and a five gang takes ten. People who have only ever fitted a one gang cover expect two screws in the box and are surprised by four.

The thread is 6-32, the American device screw standard, so the plate screws into the device ears already in your wall with no adapter. Because the heads are slotted rather than cross drilled, the slots can be turned to a consistent angle once everything is snug. Vertical on both sides is the usual choice, and it is the detail that separates a careful installation from an ordinary one.

What it costs per position

A combination plate is priced the same as any other two gang plate in the range, which means the mixed opening costs nothing extra. It is the blank plate, oddly, that carries the premium, because a blank is a solid sheet with no cutout relief.

Read the table by the last column rather than the first. Two separate single gang plates on two adjacent boxes cost 120 dollars and leave a visible seam between them. One combination plate covers the same wall for 72 dollars and reads as a single object.

Room by room: which pairing goes where

The three combinations map onto the three situations that produce a mixed two gang box in an American house.

The wiring rules that decide the pairing before taste does

Some pairings are ruled out by the circuit, not by the look, and it is cheaper to know that before the plate is cut.

Only one TRIAC dimmer belongs on a given lighting circuit. If a room is switched from two doorways, the dimmer goes at one end and a 3-way toggle goes at the other, which is exactly why the Dimmer plus Toggle plate exists. A 0-10V controller never interrupts the 120V line and always needs a separate switch beside it, so it also lands on a mixed plate. A ceiling fan motor never goes on a lighting dimmer of any kind. And a rotary opening in a plate says nothing about what is behind it: the device decides the circuit, the plate only frames it.

What your wall can physically support is a separate question again, and it is answered by the cable, the box volume and whether a neutral reached the switch. Our article on two-wire and three-wire cable walks through it, and the installation and compatibility guide is the reference page to send to an electrician. We do not confirm a wiring compatibility without written confirmation from the device manufacturer.

When the pairing you want is not one of the three

Four opening types produce more pairings than three plates can cover, and more than two gangs are common on a main entry. A toggle beside a decorator, a duplex beside a decorator, or a mixed three, four or five gang run all fall outside the stock range.

That is what the custom configurator is for: you choose the gang count, then the opening at each position from left to right, and the plate is cut to that list. Up to twenty positions and engraved labels are available, and the whole process is described in how the configurator works. Because a configured plate is made to your list, the openings are final once the order is placed.

Finishes, and the one that is made to order

The lacquered and stocked finishes are Hand Brushed Antique Brass, Satin Brass, Aged Bronze, Matte Black, Matte White and Stainless Steel. Unlacquered Antique Brass is the exception: it is made to order, its lead time is longer, and it is not returnable, because it begins changing the moment it is handled and no two pieces age alike. We say so every time we recommend it, and we would rather you order a finish sample set than guess from a photograph.

Which finish belongs in which room, and how each one behaves over a decade, is covered finish by finish in our comparison of all eight finishes. Every one is solid brass through the section, not a plated steel shell, so a scratch on a Studio Timeless plate shows more brass rather than a grey undercoat. The Copper Development Association publishes the alloy families behind those colors if you want the metallurgy.

Fitting a brass plate on an old wall

Two things go wrong on pre war and mid century walls. The first is a device set too deep, usually because a box was buried when plaster was skimmed; the screw extensions solve it. The second is a rough opening cut larger than the plate, which happens when someone before you fitted a jumbo cover. The 4.56 by 4.70 inch footprint absorbs a normal overcut, but not a jumbo one.

Taking the old cover off without cracking the surround is a craft of its own, and we wrote a full procedure for it in removing and replacing a wall plate on plaster walls. Brass is unforgiving of a screw driven at an angle.

Safety, code and when the electrician is not optional

Changing a cover plate is not electrical work in itself, but the wall behind it is live. Switch off the breaker for that circuit, then verify the absence of voltage at the device with a tester you trust, not with a non contact pen alone: a pen can read a neighbouring conductor and can miss a dead battery. A single box can hold more than one circuit, so one breaker off is not proof the box is dead. OSHA 29 CFR 1910.333 sets out the same deenergize and verify sequence for professionals.

The National Electrical Code requires a faceplate to completely cover the wall opening and to seat against the wall surface, which is the code reason a jumbo opening needs a jumbo plate rather than a shim. Your local amendments and your authority having jurisdiction have the final word, and they differ by city. Call a licensed electrician and pull a permit when you are adding or moving a box, changing a circuit, working in a panel, or finding aluminium conductors, scorched insulation or no equipment ground. Stop immediately if you find charring, a melted device or a warm plate.

Frequently asked questions

What is a combination wall plate?

A cover plate whose gangs carry two different opening types, so one plate can frame a switch and an outlet on the same box.

Do brass combination plates come in more than two gangs?

Not as stock items. All three stock combinations are two gang. Mixed three, four and five gang plates are made through the custom configurator.

Does the plate include the switch and the outlet?

No. It is a cover and four screws. The devices are supplied separately, by us or by your electrician.

Will a brass combination plate fit a standard American box?

Yes. It fits any standard North American two gang box and screws onto the 6-32 device ears already in place.

How many screws does a 2-gang plate take?

Four. Two per gang. A three gang plate takes six and a five gang takes ten.

Can a rotary opening be converted to a toggle opening?

No. The openings are cut at manufacture and cannot be enlarged or reshaped afterwards.

What size is a 2-gang brass wall plate?

Ours measure 4.56 inches wide by 4.70 inches tall by 0.080 inches thick.

Can I put a GFCI outlet behind a combination plate?

Yes, behind the decorator opening. That is the pairing on the Dimmer plus Outlet plate.

Is solid brass better than brass plated?

For a part handled daily, yes. Solid brass wears into a patina, while plating wears through to the base metal underneath.

Can I dim two circuits on one combination plate?

Not with a TRIAC dimmer on each. One TRIAC dimmer per circuit is the rule; pair a dimmer with a toggle instead.

Are the screws included?

Yes, matched solid brass screws ship in the box, 1.97 inches long with a 0.28 inch slotted head.

Is the unlacquered finish returnable?

No. Unlacquered Antique Brass is made to order, has a longer lead time and is not returnable, because it starts changing on contact.

The short version

Pick the devices, then the openings, then the finish, in that order. Two of the three stock pairings cover almost every mixed box in an American house, and the third exists because a dimmer needs a companion. Everything else goes through the configurator. Start at the brass combination plates collection, and if you are unsure what is behind your wall, read the installation and compatibility guide before you order.

Last updated: September 29, 2026