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Mains Test Blocks

Mains test blocks are temporary power hubs where mains-powered equipment can be plugged in to test equipment. These blocks are also used to test the current and voltage levels of power circuits.

Mains test blocks have plug-and-play attributes where the current can be tested without cutting the power supply. The test blocks operate on a make-before-break principle where the short-circuiting of the current transformers automatically occurs without requiring a switch for manual operation.


What are mains test blocks used for?

Mains test blocks are used for the testing of machinery to prevent damage to equipment if there are faulty currents or wires. These blocks are often used in laboratories, test beds and service areas.

Mains test blocks are used in transformers to test protection relays of secondary circuits. Test blocks are also applied to utility components to validate meter readings and calibrations. In factories, mains test blocks are also used to repair and replace equipment without having to disconnect or modify the power cable attached.

Types of mains test blocks

Mains test blocks are categorised by voltage, rating, connection type and pole count.

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Part Details Brand Stock Voltage Rating Type Cable Entry Mounting Type Connection Type Width Height Depth Maximum Supported Cable Current Rating Minimum Supported Cable
Mains Test Block, Rated At 15A, 400 V Entrelec 53 400 V Current Socket - DIN Rail Mount Ring Tongue 44mm 63mm 80mm - 15A -
Cpc-5 Couvercle de Protection pour Embas Entrelec 19 - Protecting Cover - DIN Rail Mount - 49mm 73mm 30mm - - -
Mains Test Block Cable Entry 4 → 7mm, Rated At 13A, 240 V ac Cliff Electronics 752 240 V ac - 4 → 7mm - - 60mm 48mm 127mm 7mm 13A 4mm
Mains Test Block, Rated At 13A, 24 V dc, 250 V ac Cliff Electronics 108 24 V dc, 250 V ac Mains Test Block Assembly - Base Screw 130mm 50mm 60mm - 13A -
Mains Test Block, Rated At 16A, 440 V ac RS Pro 93 440 V ac - - - - 100mm 49mm 160mm - 16A -
Test Plug Cable Entry 4 → 7mm, Rated At 5A, 240 V ac, with 1.5m Cord Cliff Electronics 19 240 V ac - 4 → 7mm - - 60mm 48mm 127mm 7mm 5A 4mm
Mains Test Block, Rated At 8A, 400 V Essailec 9 400 V - - - - 49mm 73mm 30mm - 8A -
Mains Test Block Cable Entry 0.34 → 10 (Wire Size) mm², Rated At 15A, 400 V Essailec 7 400 V - 0.34 → 10 (Wire Size) mm² - - 44mm 63mm 40mm 10 mm² 15A 0.34 mm²
Mains Test Block Cable Entry Maximum of 2.5 mm², Rated At 8A, 400 V Essailec 7 400 V - Maximum of 2.5 mm² - - 22mm 63mm 75.5mm 2.5 mm² 8A -
Current test Plug Prewired plug 2x4 pole Essailec 4 400 V - - - - 44mm 63mm - - 15A -
Voltage Testplug 2x 4 pole Direct Insert Essailec 2 400 V - - - - 44mm 63 (2*4 Pole)mm 55 (2*4 Pole) mm, 83.5 (4 Pole) mm - 8A -
Mains Test Block Cable Entry 0.34 → 10 (Wire Size) mm², Rated At 8A, 400 V Essailec 1 400 V - 0.34 → 10 (Wire Size) mm² - - 50mm 74mm 57mm 10 mm² 8A 0.34 mm²
Current Testplug 2x4 Poles direct insert Essailec 0 400 V - - - - 44mm 63mm 55mm - 15A -
Current test socket Lid Essailec 0 - - - - - 49mm 73mm 30mm - - -
Mains Test Block Cable Entry 0.34 → 10 (Wire Size) mm², Rated At 15A, 400 V Essailec 0 400 V - 0.34 → 10 (Wire Size) mm² - - 50mm 74mm 57mm 10 mm² 15A 0.34 mm²
Mains Test Block Cable Entry 0.34 → 10 (Wire Size) mm², Rated At 15A, 400 V Essailec 0 400 V - 0.34 → 10 (Wire Size) mm² - - 50mm 74mm 57mm 10 mm² 15A 0.34 mm²
Mains Test Block Cable Entry 0.34 → 10 (Wire Size) mm², Rated At 8A, 400 V Essailec 0 400 V - 0.34 → 10 (Wire Size) mm² - - 50mm 74mm 57mm 10 mm² 8A 0.34 mm²
Mains Test Block Cable Entry 0.34 → 10 (Wire Size) mm², Rated At 8A, 400 V Essailec 0 400 V - 0.34 → 10 (Wire Size) mm² - - 50mm 74mm 57mm 10 mm² 8A 0.34 mm²
Mains Test Block Cable Entry 0.34 → 10 (Wire Size) mm², Rated At 8A, 400 V Essailec 0 400 V - 0.34 → 10 (Wire Size) mm² - - 50mm 74mm 57mm 10 mm² 8A 0.34 mm²
Mains Test Block, Rated At 15A, 400 V Essailec 0 400 V - - - - 44mm 63mm 122mm - 15A -
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