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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Viewing 1 - 20 of 25 products
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Description Price Type Voltage Rating Cable Entry Circuit Type Contact Configuration Corded Mounting Type Cable Length Connection Type Width Height Depth Colour Maximum Supported Cable
RS Stock No. 811-2274
BrandRS PRO
£52.43
Each
Units
- 440 V ac - - - - - - - 100mm 49mm 160mm - -
New
RS Stock No. 199-4813
BrandRS PRO
£51.47
Each
Units
Lid 440 V ac - Voltage Normally Open - Surface Mount - Quick Connect - - - - -
New
RS Stock No. 199-4816
BrandRS PRO
£32.03
Each
Units
Lid 250 V ac, 24 V dc - Voltage Normally Open - Surface Mount - - - - - - -
RS Stock No. 458-926
£26.81
Each
Units
- 240 V ac 4 → 7mm - - - - - - 60mm 48mm 127mm - 7mm
RS Stock No. 827-041
£31.05
Each
Units
- 240 V ac 4 → 7mm - - Yes - 1.5m - 60mm 48mm 127mm - 7mm
RS Stock No. 399-6178
Mfr. Part No.CMCTVIEC
£39.90
Each
Units
- - - - - - - - - - - - - -
RS Stock No. 726-0085
£31.90
Each
Units
- 240 V ac 4 → 7mm - - Yes - 1.5m - 60mm 48mm 127mm - 7mm
RS Stock No. 804-0775
Mfr. Part No.1SNA166625R2000
BrandEssailec
£106.33
Each
Units
- 400 V 0.34 → 10 (Wire Size) mm² - - - - - - 50mm 74mm 57mm - 10 mm²
RS Stock No. 804-0750
Mfr. Part No.1SNA 16623 R1200
BrandEssailec
£106.62
Each
Units
- 400 V 0.34 → 10 (Wire Size) mm² - - - - - - 44mm 63mm 40mm - 10 mm²
RS Stock No. 399-6184
Mfr. Part No.CMCTV13A
£24.30
Each
Units
- - - - - - - - - - - - - -
RS Stock No. 804-0804
Mfr. Part No.1SNA166627R2200
BrandEssailec
£85.47
Each
Units
- 400 V 0.34 → 10 (Wire Size) mm² - - - - - - 50mm 74mm 57mm - 10 mm²
RS Stock No. 804-0788
Mfr. Part No.1SNA166578R0100
BrandEssailec
£11.13
Each
Units
- - - - - - - - - 49mm 73mm 30mm - -
RS Stock No. 804-0807
Mfr. Part No.1SNA166546R2100
BrandEssailec
£17.78
Each
Units
- 400 V - - - - - - - 44mm - 83.5mm - -
RS Stock No. 804-0781
Mfr. Part No.1SNA166638R0500
BrandEssailec
£270.18
Each
Units
- 400 V - - - - - - - 44mm 63mm - - -
RS Stock No. 804-0810
Mfr. Part No.1SNA166937R1100
BrandEssailec
£30.49
Each
Units
- 400 V - - - - - - - 44mm 63mm 122mm - -
RS Stock No. 804-0766
Mfr. Part No.1SNA166737R2000
BrandEssailec
£102.79
Each
Units
- 400 V 0.34 → 10 (Wire Size) mm² - - - - - - 50mm 74mm 57mm - 10 mm²
RS Stock No. 804-0826
Mfr. Part No.1SNA166646R0500
BrandEssailec
£6.97
Each
Units
- 400 V - - - - - - - 49mm 73mm 30mm - -
RS Stock No. 804-0778
Mfr. Part No.1SNA166936R1000
BrandEssailec
£30.49
Each
Units
- 400 V - - - - - - - 44mm 63mm 122mm - -
RS Stock No. 804-0790
Mfr. Part No.1SNA166747R0200
BrandEssailec
£86.73
Each
Units
- 400 V 0.34 → 10 (Wire Size) mm² - - - - - - 50mm 74mm 57mm - 10 mm²
RS Stock No. 804-0797
Mfr. Part No.1SNA166743R0600
BrandEssailec
£77.00
Each
Units
- 400 V 0.34 → 10 (Wire Size) mm² - - - - - - 50mm 74mm 57mm - 10 mm²