Attribute Schema Library
Attribute schemaelectrical distribution

Safety Switches & Disconnects Attributes

An enclosed safety switch is a manually operated, load-break, horsepower-rated disconnecting means in an enclosure. It satisfies NEC 430.102 when a motor needs a disconnect in sight, sits beside a rooftop unit under 440.14, and gets labeled as service equipment under 230.66. Buyers are electrical contractors, plant MRO, panel builders and OEMs. Most know the amperage and enclosure type before they know the brand.

The data is hard because the ratings buyers select on are conditional, not intrinsic. One catalog number is 10 kA SCCR on Class H fuses and 200 kA on Class R. One 100 A heavy duty switch is 25 hp at 480 V AC on standard fuses and 60 hp on time-delay. Clips ship Class H; Class R needs a rejection kit. None of that fits a scalar column, so it gets dropped.

The rest is suffix drift. The spec lives in the catalog number (H362NDS: heavy duty, 60 A, 600 V, 3-pole, neutral, 304 stainless), but the suffix alphabet is per-manufacturer and enclosure type is multi-valued. It sits in catalog tables and PDF footnotes, not in the supplier's feed.

Core

Every SKU needs these. Without them the record is not a product, it is a row.

Manufacturer Part Number (Catalog Number)
identifier
H362NDS

The catalog number is the spec. Buyers cross-reference and reorder by it, and it is the join key to every manufacturer datasheet and submittal.

Switch Duty
enum
Heavy Duty

NEMA KS 1 Type GD caps at 240 V and Types 1/3R. Type HD reaches 600 V AC/DC, 30-1200 A, Types 1 through 12K. Duty is a hard limit, not a grade.

Protection Method
enum
Fusible

Fusible or non-fusible decides whether the buyer also needs fuses, and it sets the fault rating path. First filter clicked on the rail.

Current Rating
number · A
60

Sized to the load and the upstream OCPD. Buyers filter this before anything else, and it drives enclosure size, lug range and price.

Voltage Rating (AC)
enum · V AC
600V AC

480 V and 600 V systems reject 240 V switches outright. Determines whether a General Duty switch is even eligible for the job.

Poles / Wires
enum
3 Pole / 4 Wire

3-pole/4-wire means a neutral is present. 2-pole is single-phase. Wrong pole count is the most common wrong-part return in the category.

NEMA Enclosure Type
enum
Type 4 / 4X / 5

Sets where the switch may be installed: 1 indoor, 3R outdoor, 4X washdown/corrosive, 7/9 hazardous, 12 industrial dust. Multi-valued, not scalar.

Enclosure Material
enum
304 Stainless Steel

304 vs 316 stainless is a chloride call for marine, wastewater and food plants. Fiberglass and painted steel change price and corrosion life.

Differentiating

What buyers actually compare on. This is where catalogs win or lose the filter.

Fuse Class Accepted
enum
Class H standard; Class R with rejection kit

30-600 A switches ship with Class H clips and take Class R only with a rejection kit; Class J needs the load base moved. Drives an accessory line.

Short-Circuit Current Rating (SCCR)
range · kA
10 kA (Class H) / 200 kA (Class R, J or T)

NEC 110.9/110.10. A 65 kA service needs a switch qualified to it. Same switch is 10 kA on Class H and 200 kA on Class R, J or T fuses.

Horsepower Rating (Std / Max)
text · hp
480V AC: 25 hp Std / 60 hp Max (100 A switch)

Std applies with standard fuses, Max with time-delay. A 100 A HD switch is 25 hp Std and 60 hp Max at 480 V AC. One number answers the wrong buyer.

DC Voltage Rating
enum · V DC
250V DC

DC motors and PV need a DC-rated switch. Many 3-pole HD switches are also rated 600 V DC, with the DC hp rating requiring two poles in series.

Line / Load Lug Wire Range
text · AWG / kcmil
#6–250 kcmil (Al/Cu)

The feeder has to land. A 200 A switch takes #6-250 kcmil Al/Cu; a 350 kcmil feeder or a copper-only spec needs a different lug kit.

Neutral Assembly
enum
Insulated groundable, factory installed

4-wire and service entrance work needs an insulated groundable neutral. Some ship factory installed, some are a field kit the buyer must order.

Compliance & identifiers

Standards, regulatory data, and the identifiers channels reject you for missing.

Service Entrance Rated
boolean
Yes

NEC 230.66 requires service equipment to be marked as suitable. Depends on neutral bonding and a line-side barrier; 4-pole switches are excluded.

UL 98 Listing / File Number
identifier
UL 98 Listed, File E2875

UL 98 Enclosed and Dead-Front Switches. The file number is what an inspector or engineer checks at submittal. PV switches list to UL 98B / UL 1741.

GTIN / UPC
identifier
00782113205519

Required by IDEA's data warehouse, Amazon Business and every punchout catalog. No GTIN means the SKU does not syndicate.

Country of Origin
text
Mexico

Drives tariff and duty treatment, plus Buy American / BABA eligibility on federal and utility work. Asked for on every public bid.

The fields that aren't in the schema at all

What most safety switches & disconnects catalogs are missing.

The table above is the schema most catalogs already have. These are the attributes that usually aren't in it — each one surfaced by a signal from the live market rather than by an audit of what's already there. This is what Anglera's Schema Foundry does on a real catalog, in this category.

Supplier signal
+ Short-Circuit Current Rating (SCCR)

Manufacturer catalogs publish SCCR as a table keyed to protective device: 10 kA on Class H, 100 kA on Class J or T, 200 kA on Class R. Distributor records carry 'UL 98 Listed' and no kA field.

A panel builder on a 65 kA service cannot qualify the switch from the page. The RFQ goes to whoever publishes the number, or it comes back rejected at submittal.

Competitor signal
+ Fuse Class Accepted vs. Clips Installed

Grainger's record for Square D H362NDS carries 'For Fuse Class: Class H' and 'UL Fuse Class: R' as two separate fields, with the Class R fuse kit listed under a separate manufacturer number.

Switch ships with Class H clips, the job needs Class R, and the kit was never on the order. Truck roll, emergency ship, or the switch comes back.

Supplier signal
+ Horsepower Rating (Standard vs. Maximum)

Manufacturer tables print Std and Max hp for every voltage. A 100 A heavy duty switch is 25 hp Std and 60 hp Max at 480 V AC. Distributor pages show one 'Horsepower @ 480V AC' value.

The 60 hp buyer filters 480 V AC and 60 hp, the 100 A switch never returns, and the order goes to a 200 A switch or to another distributor.

Supplier signal
+ Service Entrance Rated

Manufacturer catalogs footnote it per catalog number: service entrance labeled, neutral bonding required, 4-pole switches not approved. Distributor rails have no service-entrance filter at all.

A service disconnect gets specified from a switch never labeled for it, fails inspection under NEC 230.66, and comes back off the jobsite.

Search signal
+ DC Voltage and DC Horsepower Rating

Buyers searching for a 250 V DC or 600 V DC disconnect get nothing from catalogs carrying only an AC voltage field, though many 3-pole heavy duty switches are DC rated.

PV and DC-motor demand routes elsewhere. Worse, an AC-only record gets specified onto a DC circuit the switch cannot break at that voltage.

How Schema Foundry finds these

Messy in, governed out.

The same value, spelled every way electrical distribution suppliers spell it. A filter only works once they agree.

NEMA Enclosure Type
3RNEMA 3RType 3RRainproofNEMA-3R Outdoor3R/12
Type 3R

One switch is listed for several types. A scalar field drops the 4X hit that wins washdown and wastewater jobs.

Protection Method
Non-FusibleNonfusibleNon FusedNFWithout FusesUnfused
Non-Fusible

Grainger's own rail runs 'Nonfusible' and 'Non-Fusible' as separate values. One intent, two buckets, half the results each.

Fuse Class
Class HHClass H/KRClass R (kit)RK5
Class H standard; Class R with kit

H is what ships in the clips. R is what the switch accepts with a rejection kit. Suppliers send either, and they are not the same order.

Switch Duty
Heavy DutyHeavy-DutyHDType HDGeneral DutyGD
Heavy Duty

NEMA KS 1 Type GD stops at 240 V, Type HD reaches 600 V. Free-text duty hides a hard voltage ceiling from the filter.

What buyers ask

Every one of these should be answerable from the attributes above. If it isn't, that's a gap.

  • Will this take Class R fuses, or do I need the rejection kit?
  • What's the actual SCCR? I'm on a 65 kA service.
  • Is it rated for service entrance, or do I need the neutral bonding kit?
  • Can it break 60 hp at 480 V, or is that only with time-delay fuses?
  • Will 250 kcmil land in these lugs, or do I need a different lug kit?
  • Do I get 4X in painted steel, or does that mean stainless?
  • Is this switch rated at 250 V DC for a DC motor?
  • Does the neutral come with it, or is that a separate kit?

What channels require

The same SKU, different mandatory fields per destination.

IDEA Industry Data Warehouse (IDW)
GTIN / UPCManufacturer Part Number (Catalog Number)Country of OriginUNSPSC codeUnit of measure and pack quantityProduct description
Amazon Business
GTIN / UPCBrand and Manufacturer Part NumberCurrent RatingVoltage Rating (AC)NEMA Enclosure TypeCountry of Origin
Distributor faceted catalog and ERP punchout
Switch DutyProtection MethodCurrent RatingVoltage Rating (AC)Poles / WiresNEMA Enclosure Type
Engineer submittal / spec review package
UL 98 Listing / File NumberShort-Circuit Current Rating (SCCR)Service Entrance RatedHorsepower Rating (Std / Max)Fuse Class AcceptedEnclosure Material

Safety Switches & Disconnects data, in practice

Why carry SCCR if the switch is already UL 98 listed?

UL 98 listing is not a fault-current rating. On 30-600 A heavy duty switches the same catalog number is rated 10 kA with Class H fuses, 100 kA with Class J or T, and 200 kA with Class R. A non-fusible switch takes its rating from the upstream device, whose ampere rating must not exceed the switch's. NEC 110.9 and 110.10 make the installed rating the engineer's problem, and a record that prints only 'UL 98 Listed' cannot answer it. Model SCCR as a conditional set keyed to protective device class and switch rating, not a single kA scalar.

How do we model horsepower when the datasheet shows two numbers?

Two fields per voltage and current type: Standard and Maximum. Std applies when standard (non-time-delay) fuses are installed; Max applies with time-delay dual-element fuses. A 100 A heavy duty switch at 480 V AC is 25 hp Std and 60 hp Max. A single 'Horsepower @ 480V AC' column silently picks one, usually Std. The buyer sizing a 60 hp motor filters and never sees the switch, or the buyer who does find it installs it with the wrong fuse class and never gets the rating. Carry both, and carry them per voltage: 240, 480 and 600 V AC are different numbers on the same switch.

Do General Duty and Heavy Duty belong in the same schema?

Yes, but Switch Duty has to be a governed enum, because it carries hard limits rather than a quality grade. NEMA KS 1 Type GD is 240 V maximum, Types 1 and 3R only, plug or Class H/K/R fusing, and lower fault ratings. Type HD covers 600 V AC and DC, 30-1200 A, Types 1/3R/4/4X/5/7/9/12/12K, and 200 kA with Class R, J or T. When duty arrives as 'Heavy Duty', 'Heavy-Duty', 'HD' and 'Type HD' from four suppliers, the 240 V ceiling on GD stops being enforceable in the filter rail, and a GD switch gets quoted onto a 480 V motor.

Why isn't NEMA Enclosure Type a single value, and can we derive IP from it?

Switches are listed for several types at once, so the field is a multi-value governed set. Grainger's record for Square D H362NDS shows 'NEMA Enclosure Rating: 5' in the spec table while the title lists 3R/3/12/4/4X. A Type 4X filter matching a scalar '5' will not return that switch. On IP: no, do not derive it. NEMA types include corrosion, icing and gasket-ageing tests that IEC 60529 IP codes do not, so any mapping is one-way and approximate. The same Grainger record shows 'IP Rating: Not Rated' on a stainless switch. If a buyer specs IP65 or IP66, source that rating separately from the manufacturer.

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