A telescopic mast comprising: a base part being arranged to support the telescopic mast in a using position, which is a substantially vertical position, a telescopic part comprising a plurality of hollow mast sections (21, 22, 23, 24) being telescopically displaceable relative to each other, and wherein at least a second mast section being telescopically displaceable relative to a first mast section, and the first mast section is arranged to be attached to the base part, at least one armature carrier (30, 31, 32) arranged for carrying at least one armature, and the second mast section has a larger cross section compared to the first mast section, and the second mast section is at least partly enclosing at least a portion of the first mast section in the using position of the telescopic mast, wherein the plurality of mast sections (21, 22, 23, 24) are telescopically arranged one outside the other so that each mast section has a wider cross-section compared to former one seen from the bottom to the top referring to the using position, wherein at least one of the mast sections (21, 22, 23, 24) comprises a plurality of recesses (25, 25', 25", 25 n), and at least one enclosing mast section (22, 23, 24) comprises at least one first type of locking device arranged to engage with the at least one recess of an inner lying mast section (21, 22, 23), wherein the first type of locking device comprises a spring-loaded pin and a spring, and a first end of the pin is arranged to automatically engage with the at least one recess of an inner lying mast section (21, 22, 23) by means of the spring-force from the spring, wherein at least one enclosing mast section (22, 23, 24) comprises a second type of locking device, characterized in that the second type of locking device is arranged to engage with an outside of an inner lying mast section (21, 22, 23), via a through hole of the enclosing mast section (22, 23, 24). a base part being arranged to support the telescopic mast in a using position, which is a substantially vertical position, a telescopic part comprising a plurality of hollow mast sections (21, 22, 23, 24) being telescopically displaceable relative to each other, and wherein at least a second mast section being telescopically displaceable relative to a first mast section, and the first mast section is arranged to be attached to the base part, at least one armature carrier (30, 31, 32) arranged for carrying at least one armature, and the second mast section has a larger cross section compared to the first mast section, and the second mast section is at least partly enclosing at least a portion of the first mast section in the using position of the telescopic mast, wherein the plurality of mast sections (21, 22, 23, 24) are telescopically arranged one outside the other so that each mast section has a wider cross-section compared to former one seen from the bottom to the top referring to the using position, wherein at least one of the mast sections (21, 22, 23, 24) comprises a plurality of recesses (25, 25', 25", 25 n), and at least one enclosing mast section (22, 23, 24) comprises at least one first type of locking device arranged to engage with the at least one recess of an inner lying mast section (21, 22, 23), wherein the first type of locking device comprises a spring-loaded pin and a spring, and a first end of the pin is arranged to automatically engage with the at least one recess of an inner lying mast section (21, 22, 23) by means of the spring-force from the spring, wherein at least one enclosing mast section (22, 23, 24) comprises a second type of locking device, characterized in that the second type of locking device is arranged to engage with an outside of an inner lying mast section (21, 22, 23), via a through hole of the enclosing mast section (22, 23, 24).