Low Voltage Switchboards

Read revision 9

Revision 9 · Oct 12, 2026 +18 −2

Datasheet constraints: every range, checkbox and listbox field now states its direction
Showing changes from Rev 8 to Rev 9 in Low Voltage Switchboards.
---
title: Low Voltage Switchboards
…111 unchanged lines
- "Schematic and wiring diagrams"
- "Nameplate schedule"
+constraint: all_of
```
…27 unchanged lines
- "Field testing firm and technician qualifications"
- "Trip unit and fuse characteristic data for the coordination study"
+constraint: all_of
```
…35 unchanged lines
- "Warranty certificate"
- "Spare parts and keys receipt"
+constraint: all_of
```
…5 unchanged lines
```datasheet
−label: Minimum Manufacturer Listing History
+label: Manufacturer Listing History
type: range
unit: years
…3 unchanged lines
setpoints: [0, 3, 5, 10, 20]
default: 5
+constraint: min
```
…44 unchanged lines
setpoints: [25, 30, 40, 50, 55]
default: 40
+constraint: min
```
…148 unchanged lines
setpoints: [400, 600, 800, 1000, 1200, 1600, 2000, 2500, 3000, 3200, 4000, 5000, 6000]
default: deferred
+constraint: exact
```
…32 unchanged lines
setpoints: [22, 25, 35, 42, 50, 65, 85, 100, 150, 200]
default: deferred
+constraint: min
```
…12 unchanged lines
setpoints: [22, 25, 35, 42, 50, 65, 85, 100, 150, 200]
default: derived
+constraint: min
```
…40 unchanged lines
setpoints: [22, 25, 35, 42, 50, 65, 85, 100, 150, 200]
default: derived
+constraint: min
```
…252 unchanged lines
```datasheet
−label: Minimum Spare Feeder Positions
+label: Spare Feeder Positions
type: range
unit: '%'
…2 unchanged lines
max: 30
setpoints: [0, 10, 15, 20, 25, 30]
+constraint: min
```
…263 unchanged lines
default:
- "Barrier between the main bus compartment and the device compartments"
+constraint: all_of
```
…61 unchanged lines
- "Remote operator for the main device"
- "Remote racking device for a drawout-mounted main"
+constraint: all_of
```
…106 unchanged lines
- "Surge protective device status contacts"
- "Energy-reducing maintenance switch status"
+constraint: all_of
```
…82 unchanged lines
- "Trip unit and relay settings verification against the coordination study"
- "Neutral-to-ground separation verification on every switchboard that is not service equipment"
+constraint: all_of
```
…108 unchanged lines
max: 5
setpoints: [1, 2, 3, 5]
+constraint: min
```
…44 unchanged lines
- "One set of blank covers for every space position on the project"
- "Two sets of keys for every lock and key interlock"
+constraint: all_of
```
## Spare devices shall be identical to and interchangeable with the installed devices, shall be delivered in their original packaging, and shall be labeled with the switchboard designation and the device rating they serve.
## Spare devices and fuses shall be stored in a labeled cabinet in the electrical room furnished by the Contractor, and shall not be stored inside an operating switchboard.

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