Here is a comprehensive Quality Assurance (QA) & Pre-FAT Cold Check Inspection Checklist designed to accompany Milestone 3 of your Statement of Work. It adheres to BS EN 60204-1 (Safety of Machinery – Electrical Equipment of Machines) and standard UK control panel manufacturing practices.

Control Panel QA & Pre-FAT Cold Check Inspection Sheet

Panel / Job Reference: [e.g., MCC-L3-001]

Drawing / Schematic Rev: [e.g., SCH-4081-RevC]

Enclosure Serial No.: [Serial Number]

Inspector / Lead Wireman: [Inspector Name]

Inspection Date: [DD/MM/YYYY]

Overall Status: [ ] PASS [ ] RECTIFICATION REQUIRED [ ] RE-TEST PASSED

Section 1: Mechanical Assembly & Enclosure Integrity

Item	Inspection / Check Criteria	Standard / Requirement	Result (P/F/NA)	Comments / Notes
1.1	Enclosure & Finish	Free from scratches, dents, metal swarf, or drilling burrs. IP rating seals intact.	`[ ]`
1.2	Component Mounting	All DIN rails, trunking, contactors, breakers, and PLCs securely fastened per layout drawings.	`[ ]`
1.3	Trunking & Looming	Slotted trunking covers fitted flush. Wiring looms neatly loomed, tie-wrapped, and sleeved across door hinges.	`[ ]`
1.4	Door Hardware & Clearances	Hinges and locks operate freely; door earth straps fitted; adequate clearance to backplate components when closed.	`[ ]`
1.5	Ventilation & Ingress	Filters, cooling fans, vents, or louvres correctly installed with correct airflow direction.	`[ ]`

Section 2: Electrical Installation & Conductor Compliance

Item	Inspection / Check Criteria	Standard / Requirement	Result (P/F/NA)	Comments / Notes
2.1	Conductor Specification	BS 6231 Tri-Rated / Class 5 flexible copper used throughout; metric sizing matches BOM.	`[ ]`
2.2	Conductor Colour Coding	Black: AC/DC Power Red: AC Control Dark Blue: 24V DC (+) Light Blue: AC Neutral White / Blue: 0V DC Common Orange: Interlocks live with isolator OFF	`[ ]`
2.3	Terminations & Ferrules	Bootlace ferrules correctly crimped on all stranded wire ends (no loose copper strands outside collars).	`[ ]`
2.4	Mechanical Termination (Torque)	Main incoming breaker, contactor lugs, and busbar bolts torqued to manufacturer spec and torque marked.	`[ ]`
2.5	Terminal & Wire Identification	All terminal blocks numbered per schematic; heat-shrink or printed ferrule markers readable and aligned.	`[ ]`
2.6	Segregation & Clearance	Clear separation maintained between low-voltage power (400V/230V) and extra-low-voltage/data (24V DC / Profinet / Ethernet).	`[ ]`

Section 3: Protective Earth (PE) & Bonding Verification

Apparatus: Calibrated Low-Resistance Ohmmeter / Continuity Tester.

Item	Test Point Description	Specified Limit	Measured Value (Ω)	Result (P/F)
3.1	Main Earth Terminal (MET) to Enclosure Main Frame	$\le 0.1\,\Omega$	`______` $\Omega$	`[ ]`
3.2	MET to Enclosure Door (via flexible Earth Strap)	$\le 0.1\,\Omega$	`______` $\Omega$	`[ ]`
3.3	MET to Sub-panel / Backplate Chassis	$\le 0.1\,\Omega$	`______` $\Omega$	`[ ]`
3.4	MET to DIN Rails & Motor Earth Terminals	$\le 0.1\,\Omega$	`______` $\Omega$	`[ ]`
3.5	Conductor Check: Earth conductors strictly Green/Yellow	Visual	—	`[ ]`

Section 4: Cold Point-to-Point Continuity & Resistance Checks

Item	Test Description	Acceptance Criteria	Measured Value	Result (P/F)
4.1	Point-to-Point Buzzer / Continuity	100% check against schematic netlist from terminal block to terminal block.	Complete circuit path; no cross-connections	`[ ]`
4.2	Safety Circuit Cold Check	Emergency Stop circuits (dual channel) open and close contacts as expected via pushbutton operation.	Open / Closed verified	`[ ]`
4.3	Fuse & MCB Sizing Verification	All fuse links and circuit breaker trip curves match schematic ratings (e.g., Type C vs Type D).	Ratings verified against drawing	`[ ]`

Section 5: Insulation Resistance (Megger) Testing

CRITICAL PRECAUTION BEFORE TESTING:

Disconnect all sensitive electronic components (PLCs, digital modules, VFDs, power supply units, surge protection devices, and sensor interfaces) or bridge lines as necessary prior to applying test voltages to prevent component breakdown.

Applied Test Voltage: [ ] 500V DC (Standard BS EN 60204-1)

Minimum Acceptable Insulation Resistance: $\ge 1.0\text{ M}\Omega$ (typically expects $>50\text{ M}\Omega$ on dry workshop builds).

Circuit Tested	Between	Applied Voltage	Minimum Required	Measured Value	Result (P/F)
Power Circuits	Phase L1 to Earth (PE)	500V DC	$\ge 1.0\text{ M}\Omega$	`______` $\text{M}\Omega$	`[ ]`
Power Circuits	Phase L2 to Earth (PE)	500V DC	$\ge 1.0\text{ M}\Omega$	`______` $\text{M}\Omega$	`[ ]`
Power Circuits	Phase L3 to Earth (PE)	500V DC	$\ge 1.0\text{ M}\Omega$	`______` $\text{M}\Omega$	`[ ]`
Power Circuits	Phase to Phase (L1-L2, L2-L3, L3-L1)	500V DC	$\ge 1.0\text{ M}\Omega$	`______` $\text{M}\Omega$	`[ ]`
Power to Neutral	Phase (L1/L2/L3) to Neutral (N)	500V DC	$\ge 1.0\text{ M}\Omega$	`______` $\text{M}\Omega$	`[ ]`
Control Circuits	230V AC Control to Earth (PE)	500V DC	$\ge 1.0\text{ M}\Omega$	`______` $\text{M}\Omega$	`[ ]`
DC Circuits (Passive)	24V DC Bus to Earth (PE)	250V / 500V DC	$\ge 1.0\text{ M}\Omega$	`______` $\text{M}\Omega$	`[ ]`

Section 6: Test Equipment Register & Calibration

Equipment Type	Make / Model	Serial Number	Calibration Expiry Date
Multimeter / Continuity Tester	`[e.g., Fluke 179]`	`[SN-XXXXX]`	`[DD/MM/YYYY]`
Insulation Tester (Megger)	`[e.g., Megger MIT400]`	`[SN-XXXXX]`	`[DD/MM/YYYY]`
Calibrated Torque Screwdriver	`[e.g., Wera Torque VDE]`	`[SN-XXXXX]`	`[DD/MM/YYYY]`

Section 7: Defect Rectification Log & Sign-Off

Item #	Identified Snag / Defect	Rectification Action Taken	Date Resolved	Re-Inspected By
1	`[e.g., Ferrule loose on terminal X1:14]`	`[Re-stripped and re-crimped 1.0mm² ferrule]`	`[Date]`	`[Initials]`
2	`[e.g., Missing warning label on door]`	`[Affixed BS EN 60204-1 400V flash warning]`	`[Date]`	`[Initials]`

Inspector Declaration:

I confirm that the control panel specified above has undergone thorough mechanical, wiring, continuity, and insulation cold checks in accordance with BS EN 60204-1 and the approved engineering schematics. All identified defects have been rectified, and the panel is deemed ready for live energisation and Factory Acceptance Testing (FAT).

Lead Wireman / Inspector Signature: ___________________________

Date: [DD/MM/YYYY]

Client Representative Witness / Acceptance: ___________________________