Step 1: Switchboard case installation

DANGER
HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH Apply appropriate personal protective equipment (PPE) and follow safe electrical work practices. See NFPA 70E in the USA, CSA Z462 or applicable local standards. Turn off all power supplying this device and the equipment in which it is installed before working on the device or equipment. Always use a properly rated voltage sensing device to confirm that all power is off. Never bypass external fusing. Install properly rated fuses in voltage measurement circuits and in auxiliary (control) power circuit. Do not exceed the device’s ratings for maximum limits. Never short the secondary of a potential/voltage transformer (PT/VT). Never open circuit a current transformer (CT). Always use grounded external CTs for current inputs. Connect protective ground (earth) before turning on any power supplying this device. Replace all devices, doors and covers before turning on power to this equipment. All electrical connections to the meter terminals must not be user-accessible after installation. Failure to follow these instructions will result in death or serious injury.

DANGER

HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH

Apply appropriate personal protective equipment (PPE) and follow safe electrical work practices. See NFPA 70E in the USA, CSA Z462 or applicable local standards.
Turn off all power supplying this device and the equipment in which it is installed before working on the device or equipment.
Always use a properly rated voltage sensing device to confirm that all power is off.
Never bypass external fusing. Install properly rated fuses in voltage measurement circuits and in auxiliary (control) power circuit.
Do not exceed the device’s ratings for maximum limits.
Never short the secondary of a potential/voltage transformer (PT/VT).
Never open circuit a current transformer (CT).
Always use grounded external CTs for current inputs.
Connect protective ground (earth) before turning on any power supplying this device.
Replace all devices, doors and covers before turning on power to this equipment.
All electrical connections to the meter terminals must not be user-accessible after installation.

Failure to follow these instructions will result in death or serious injury.

Disconnect and lock out power. Use a properly rated voltage sensing device to confirm that power is off.

Prepare the mounting surface for the FT-21 case. Refer to the drawing for hole dimensions.

Place the meter on a sturdy surface. Locate the thumbscrew (A) at the bottom of the switchboard cover and turn it counter-clockwise to release the cover.
Pull the bottom of the cover slightly towards you and lift it up to unhook it from the top retaining tabs (B). Set cover aside.
Push down and open all the lever contact switches (C).
Push the locking levers (D) to unlock the meter chassis (push up on the left lever, push down on the right lever).

Grab the top bracket handle (E), then carefully slide out the meter chassis and set it aside.

Insert the FT-21 case into the mounting hole.
Secure the lockwashers and nuts (F) onto the rear mounting studs. Tighten with a hex socket wrench or nut driver.
Align the meter chassis to the switchboard and carefully slide in the chassis, pushing forward on the bottom half of the meter bezel to mate the meter and meter case rear connectors.
Pull the locking levers (G) to lock the meter chassis to the case (pull down on the left lever, pull up on the right lever).

Push up and close all the lever contact switches (H).

Replace the cover, aligning the slots along the top with the retaining tabs (I) on the case.
Close the cover and hand-tighten the thumbscrew (J).